The first rock sample, Genesis, reveals that the rock is composed of minerals of varying hues, both light and dark, arranged in layers.
The parallel mineral grains that give the rock layer its striped appearance make it defoliated. They have two sorts banding appearance which is their trademark feature,the more obscure band is made out of manic minerals and the lighter layer is made out of silicate minerals.
2. The second rock sample is composed of smooth, flat layers with no gaps between the grained material that has been folded into various layers. They have an exchanging dull and light banding design , the groups are in the wavy structure. Quartz and mica make up the white layer. The grain size is of medium.
3.In third example of rock is marble foliated trans formative stone, it has all the earmarks of being in finished white tone as it is made out of calcium rich minerals of same size. Marbles are made of metamorphic rock, which forms when limestone is exposed to extreme temperatures and pressures. The grain size of rock is of medium , these stones can be effortlessly separated into models, it seems, by all accounts, to be sparkly.
4. The rock in the fourth sample is composed of mica layers, and the garnet crystals are arranged at random. The grains are of medium and fine size .
5. In the fifth sample, the rock is Phyllite, which is defoliated metamorphic rock with wavy, uneven surface defoliation and white-grained mica. The shade of the stone is dim or blackish. The size of their grains is medium.
6. The rock in the sixth sample is Schist-foliated metamorphic rock. They are composed of chlorite, Muscovite, and biotite, which is their characteristic feature, and they have an alternating black and white band. The texture of the rock is broken into thin slabs and unevenly as well. They have medium-sized grains that can be seen.
B )The stones can be characterized on the premise whether the are defoliated or non defoliated trans formative ,their composition as the banding designs in the event that they have any as well as regardless of whether they seems, by all accounts, to be sparkling.
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Complete question as follows :
analyze the metamorphic rocks in fig. a 7.1.1 and actual rock samples of them, if available.
2. beneath or beside each picture, briefly note the most distinctive features you observe in the rock.
3. for example, does the sample appear to be mostly or entirely composed of the same mineral?
4. Is the rock layered (foliated)? are the foliations planar or folded?
5. are different layers com- posed of different colors/types of mineral?
6. are some mineral grains large and others much smaller? i
b . Is there any hint of shiny mica minerals along the defoliation?
How can you tell if an animal is growing?
Weight and height are ways you tell if an animal is growing
How can you tell if an animal is growing?Observing growth in animals is doable through several approaches, such as:
Weight: Gaining insight into an animal's expansion can be accomplished by observing its weight. Through monitoring their development with consecutive weigh-ins, determining if these organisms are growing healthily is achievable.
Height: For species that develop vertically, ascertaining height can also indicate growth. Horse or dog owners, for example, can appraise the shoulder size of their pet to gauge their quantitative enhancement.
Body size and proportion: In addition to measuring the viability of the weight and height of an animal, noticing changes in the body size and balance serves to verify expansion. If a puppy briskly grows taller while keeping their head in sync with the rest of their body, this illustrates maturity in its early stages.
Developmental milestones: Snapping shots of your furry friend in various activities provide useful information about physical growth. Take birds, for instance; forming feathers or learning how to fly indicates prolific development.
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Hot spots in oceanic settings typically produce:
a. flood basalts in the middle of a continent
b. huge caldera explosions
c. island arcs
d. lines or clusters of volcanic islands
d. lines or clusters of volcanic islands. Hot spots in oceanic settings typically create chains of volcanic islands, such as the Hawaiian Islands or the Galapagos Islands.
These chains are formed as the tectonic plates move over the stationary hot spot, which produces magma that rises to the surface and creates new volcanoes. As the plate continues to move, the volcano moves away from the hot spot, becomes extinct, and is eventually eroded away, while a new volcano forms above the active hot spot. This process continues over millions of years, resulting in a chain of islands that increases in age as it extends away from the active hot spot.
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because glacial advance is driven by gravity, it is impossible for glaciers to advance over perfectly flat terrain. true or false
True. Glacial advance is driven by gravity, but glaciers require a slope or gradient to move downhill.
Without a slope, glaciers cannot gain momentum to advance. Perfectly flat terrain would not provide any slope or gradient
For the glacier to move forward, so it would be impossible for the glacier to advance over such terrain.
Additionally, even slight undulations in the terrain may affect the direction and speed of glacial movement.
Therefore, a slope is necessary for glacial advance to occur.
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xplain why the following telescope might not be very effective for research: a 10-m infrared telescope located in space right next to earth.
To address your concern regarding the effectiveness of a 10-meter infrared telescope located in space right next to Earth, here are some facts you need to note-
A 10-m infrared telescope located in space right next to Earth might not be very effective for research due to several reasons like atmospheric interference, inability to cool down itself being very close to earth, limited view of the sky and so on.
1. Atmospheric interference: Although the telescope is in space, being close to Earth means it may still be affected by Earth's atmosphere, which can absorb infrared radiation and reduce the telescope's ability to observe celestial objects clearly.
2. Thermal emission from the telescope: A 10-m infrared telescope would require cooling systems to minimize its own thermal emission. Being close to Earth, the telescope could be more exposed to heat sources, making it harder to maintain the required low temperatures for accurate infrared observations.
3. Orbital mechanics: Being in space right next to Earth means the telescope would likely be in a low Earth orbit. This requires constant adjustments to maintain its position, which may impact its ability to accurately observe and collect data on celestial objects.
4. Limited view of the sky: Due to its proximity to Earth, the 10-m infrared telescope would have a limited view of the sky compared to a telescope located further away in space or at an appropriate location on Earth.
In conclusion, a 10-m infrared telescope located in space right next to Earth might not be very effective for research because of atmospheric interference, the challenges of managing its thermal emissions, orbital mechanics, and its limited view of the sky.
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Earthquakes with a Richter magnitude less than 2.0 are generally not felt by humans.
A)True
B)False
The statement "Earthquakes with a Richter magnitude less than 2.0 are generally not felt by humans" is generally true.
Earthquakes with a magnitude of less than 2.0 are considered microearthquakes and are typically only detected by seismometers. They generally do not produce significant ground shaking and are not felt by humans, except in very rare cases and under very specific conditions. In contrast, earthquakes with a magnitude of 2.5 or higher are typically felt by humans, with the intensity of shaking increasing as the magnitude increases. However, the distance from the epicenter, the depth of the earthquake, and the geology of the area can all affect the intensity of shaking felt at a particular location. It is worth noting that the Richter magnitude scale is logarithmic, meaning that each increase in magnitude represents a tenfold increase in the energy released by the earthquake. This means that a magnitude 2.0 earthquake is 10 times more powerful than a magnitude 1.0 earthquake and that a magnitude 3.0 earthquake is 10 times more powerful than a magnitude 2.0 earthquake.
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A syncline is a downfold in rock where the youngest layers are in the middle of the fold and the oldest are on the outside.
A)True
B)False
B) False. A syncline is a downfold in rock where the youngest layers are in the middle of the fold and the oldest are on the outside.
A syncline is a type of fold in rock layers where the layers are folded downward in a U-shape.
The youngest layers are typically found on the outer parts of the fold and the oldest layers are found toward the center. This is the opposite of what is stated in the statement. In contrast, an anticline is a fold in rock layers where the layers are folded upward in an A-shape, with the oldest layers on the outer parts of the fold and the youngest layers toward the center.
A syncline is a type of fold in rock layers where the layers are folded downward in a U-shape. This typically occurs in response to compressional forces in the Earth's crust, where the layers are squeezed and folded like a piece of paper being pushed together from the sides.
The youngest layers are typically found on the outer parts of the fold, where the layers are less compressed and less deformed, and the oldest layers are found toward the center, where the layers are more compressed and more deformed.
Synclines are often associated with other types of geological features, such as faults and thrusts, which can further deform the layers and create complex patterns of folding and faulting.
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About ______ cubic kilometers of ash were released by Mount St. Helens, and a similar amount of material formed pyroclastic flows.
a. 0.25
b. 0.025
c. 0.22
d. 0.0002
Your answer is (a) 0.25 cubic kilometers. About 0.25 cubic kilometers of ash were released by Mount St. Helens, and a similar amount of material formed pyroclastic flows during the eruption in 1980. This eruption had a significant impact on the surrounding environment, including wildlife, vegetation, and water systems.
The answer is a. 0.25 cubic kilometers of ash were released by Mount St. Helens during its eruption on May 18, 1980. This eruption was one of the most significant volcanic events in U.S. history, and it caused widespread destruction and loss of life. In addition to the ash, a similar amount of material formed pyroclastic flows, which are fast-moving currents of hot gas and volcanic debris that can travel at high speeds and distances. The ash and other materials ejected from Mount St. Helens during its eruption had significant impacts on the surrounding environment and ecosystems, including changes to local waterways and forests. The aftermath of the eruption also provided scientists with valuable insights into the behavior of volcanoes and the ways in which they can impact the environment and human communities.
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What is a mantle plume?
A) a plume of fire
B) a region of the mantle that has doubled in thickness
C) a plume of hot water and gas that mobilizes the ions in the surrounding country rock
D) hot mantle rock rising from deep within the Earth
Mantle plume is D) hot mantle rock rising from deep within the Earth.
A mantle plume is a column of extremely hot and buoyant mantle rock that rises from deep within the Earth's mantle. It is believed to be the driving force behind volcanic activity and can create volcanic hotspots, such as the one responsible for the formation of the Hawaiian Islands. As the plume rises, it melts the overlying rock, which can lead to the formation of magma and eventually volcanic eruptions. The surrounding rock is referred to as the country rock.
A mantle plume is an upwelling of abnormally hot rock within the Earth's mantle, which extends from the core-mantle boundary to the base of the crust. As the hot rock rises, it can interact with the country rock (the pre-existing rock through which the plume moves) and potentially cause volcanic activity at the surface.
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how does the buoyancy of magma cause volcanic eruptions
Answer:
The magma rises and collects in chambers within the crust. As magma fills the chamber, pressure grows. If the pressure gets high enough, the magma can break through the crust and spew out in a volcanic eruption.
Explanation:
The points where constraints intersect on the boundary of the feasible region are termed as thea. extreme pointsb. feasible edgesc. objective function contourd. feasible points
The points where constraints intersect on the boundary of the feasible region are called extreme points or corner points. The correct answer is option a.
These points are important because they define the vertices of the feasible region and determine the shape of the region. Each extreme point represents a unique combination of decision variables that satisfies all of the constraints.
The optimal solution of a linear programming problem is always located at one of these extreme points. Therefore, finding and evaluating the objective function at each extreme point is an important step in solving a linear programming problem.
Extreme points are critical in determining the feasible region and finding the optimal solution in linear programming. The correct answer is option a.
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please match the typhoon category with its defining criteria.group of answer choices tropical depression [ choose ] typhoon [ choose ] strong typhoon [ choose ] very strong typhoon [ choose ] violent typhoon [ choose ]
Tropical depression: a tropical cyclone with maximum sustained winds of up to 38 mph (62 km/h).
Typhoon: a tropical cyclone with maximum sustained winds of at least 74 mph (119 km/h). A typhoon is a type of tropical cyclone that occurs in the Western Pacific Ocean. Typhoons are similar to hurricanes and cyclones, which occur in other parts of the world, but they are known by different names depending on their location.
Strong typhoon: a tropical cyclone with maximum sustained winds of at least 96 mph (154 km/h) but less than 116 mph (187 km/h). A strong typhoon is a typhoon that has intensified to become a powerful and potentially destructive storm. The strength of a typhoon is typically measured by its maximum sustained winds, which can reach over 150 miles per hour (240 kilometers per hour) in the most severe cases
Very strong typhoon: a tropical cyclone with maximum sustained winds of at least 116 mph (187 km/h) but less than 137 mph (220 km/h). A very strong typhoon is a typhoon that has intensified to become an extremely powerful and potentially catastrophic storm. It is typically characterized by sustained winds of 155 miles per hour (250 kilometers per hour) or higher, which can cause widespread devastation and loss of life
Violent typhoon: a tropical cyclone with maximum sustained winds of at least 137 mph (220 km/h).
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Mafic lava erupted at a submarine volcano will produce __________ .
A. an a'a' flow
B. a cinder cone
C. a pahoehoe flow
D. pillow basalt
Mafic lava erupted at a submarine volcano will produce pillow basalt. Option D is correct.
Mafic lava is rich in magnesium and iron, and has a low viscosity, which means it flows easily. When mafic lava is erupted at a submarine volcano, it cools quickly as it comes into contact with the cold water, forming pillow-shaped structures. These pillow-shaped rocks are known as pillow basalt and are a characteristic feature of submarine volcanic eruptions. A'a' and pahoehoe flows are types of lava that are typically associated with Hawaiian volcanoes, which have a different composition and erupt on land, not under water. A cinder cone is a type of volcano that forms from explosive eruptions of tephra, or volcanic ash and rock fragments.
Pillow basalt is a type of volcanic rock that is formed when lava erupts underwater or flows into the ocean. The lava cools quickly when it comes into contact with the cold water, causing it to solidify into pillow-shaped structures. These structures are created as the hot lava flows into the cold water and solidifies quickly at the edges, while the still-molten interior continues to flow forward, creating a "pillow" shape.
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Identify means Africans developed to resits the dehumanizing nature of slavery and maintain their family and gender systems, culture, and religion
Africans maintain their cultural heritage, family and gender systems, and religious practices during the era of slavery. They also served as a means of expressing their humanity and resisting the dehumanizing nature of slavery.
During the era of slavery, Africans developed various means of resistance to maintain their cultural heritage, family and gender systems, and religious practices. These means included:
1. Family and Community Ties: Africans in slavery developed strong bonds with their families and communities as a means of maintaining their identity and culture. They created support networks, shared stories, and developed their own social structures that supported their religious beliefs and cultural traditions.
2. Spiritual Resistance: Africans developed their own form of religion that blended their traditional beliefs with the Christian teachings of their slave owners. This included the creation of secret societies, such as the Underground Railroad, that helped enslaved Africans escape to freedom.
3. Art and Music: Africans used art and music to express their feelings and maintain their cultural traditions. They used storytelling, dance, and music to communicate and preserve their cultural identity.
4. Language: Africans developed their own language, such as Gullah and Creole, as a way of communicating with one another in secret and maintaining their cultural heritage.
5. Rebellion: Africans also rebelled against their slave owners as a means of resisting the dehumanizing nature of slavery. This included running away, sabotaging equipment, and organizing revolts, such as the Haitian Revolution.
Overall, these means of resistance helped Africans maintain their cultural heritage, family and gender systems, and religious practices during the era of slavery. They also served as a means of expressing their humanity and resisting the dehumanizing nature of slavery.
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Throughout the history of slavery, Africans developed various means to resist and maintain their family and gender systems, culture, and religion.
One of the most effective ways they resisted the dehumanizing nature of slavery was by creating tight-knit communities and forming strong family bonds. African slaves would often create their own family structures and gender roles within the confines of slavery, which allowed them to maintain a sense of cultural identity and resist the destruction of their traditional African family structures.
In addition to forming close-knit communities, African slaves also resisted the dehumanizing nature of slavery by using their religious and spiritual practices to maintain a sense of hope and resilience. African slaves would often incorporate their own religious and spiritual practices into Christianity, which helped them to maintain their cultural identity and resist the attempts of slaveholders to strip them of their traditional beliefs.
Another means by which Africans resisted the dehumanizing nature of slavery was by engaging in acts of rebellion and resistance. From slave revolts to running away, Africans found ways to resist the oppressive nature of slavery and fight for their freedom.
Overall, Africans developed various means of resistance to maintain their family and gender systems, culture, and religion during the period of slavery. These strategies helped to preserve their cultural identity and provide a sense of hope and resilience in the face of unimaginable oppression.
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What changes are occurring in the igneous pluton that would result in sheeting?
A) temperature decrease
B) confining pressure increase
C) glacial action
D) partial melting
E) volume increase
Sheeting occurs when igneous plutons are exposed at the Earth's surface and undergo a process known as exfoliation due to the release of confining pressure. Therefore the correct option is option B.
When igneous plutons are exposed at the Earth's surface and experience exfoliation as a result of confining pressure being released, sheeting results.
Reduced pressure on the pluton results in the outer layers of the rock to crack and peel away from the surface in sheets when the overlaying rock is eroded away.
The outer layers of the rock fracture and separate as a result of this process because the rock expands when exposed to lower pressures. Therefore the correct option is option B.
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Long-period seismic waves (LP) are generated by ______, which can be used to predict volcanoes because ______.
Long-period seismic waves (LP) are generated by magma movement, which can be used to predict volcanoes because these waves indicate increased pressure and activity within the volcanic system, signaling a potential eruption.
Long-period seismic waves (LP) are generated by the movement of magma beneath the Earth's surface, which can be used to predict volcanoes because they indicate the buildup of pressure within the volcano's magma chamber. When the pressure becomes too great, the volcano may erupt, and the LP waves can provide warning signals to alert scientists of an impending eruption. By monitoring LP waves, scientists can better understand the behavior of volcanoes and make predictions about their activity.
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Mesopotamia was a ? a center from which rich cultures develop and spread to other places.
The developments described in this passage most clearly reflect with of the following?
The developments described in this passage most clearly reflect: the degree to which Mali increased interregional trade. Option C
What should you know about Mansa Musa and his spending as a way to increased interregional trade?The text in the picture describes Mansa Musa, King of Mali, visiting Cairo in 1324 during his trip to Mecca.
Mansa Musa's travel to Cairo tell us more about the growing interregional economic and cultural trade/integration that happend between West Africa and other areas throughout the 14th century.
in the statement " I heard talk of the arrival of this sultan Musa on his Pilgrimage and found the Cairenes eager to recount what they had seem of the Africans' prodigal spending" Prodigal spending in the passage hints to trade
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Answer:
B
Explanation:
I did the assessment before
hypoxic dead zones often result in regions that have experienced extreme eutrophication. i. identify one environmental impact of dead zones.
Let us address your question about hypoxic dead zones and extreme eutrophication. One environmental impact of dead zones, which often result from extreme eutrophication, is a significant decrease in biodiversity.
This is to be noted that decrease in biodiversity occurs because the low oxygen levels in the dead zone , as a result of extreme eutrophication make it difficult for many aquatic species to survive, leading to the death of fish, crustaceans, and other marine life.
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When do we get rhyolite and granite?
Tear-shaped mounds of sediment formed by glacial deposition are called __________.
Answer: Sediments transported and deposited by glacial ice are known as till.
Explanation: hope this helps :)
________ is a technique where the decay rate of radioactive isotopes is measured and used to determine the age of a geologic material.
A) Half-Life
B) Ion Exchange
C) Electron Capture
D) Radiometric Dating
D) Radiometric dating is a technique where the decay rate of radioactive isotopes is measured and used to determine the age of a geologic material. This method involves the exchange of isotopes as they decay, the capture of particles during the decay process, and the use of radiometric measurements to calculate the age.
Radiometric Dating is a technique where the decay rate of radioactive isotopes is measured and used to determine the age of a geologic material. This process involves the exchange of one element for another through radioactive decay, and the capture of electrons in the process is known as electron capture. Radiometric dating also relies on accurate measurements of the radiometric properties of the sample, such as its radiometric age and the radiometric properties of its surrounding environment, known as radiometric capture.
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The presence of media hubs, coalitions focusing on specific environmental challenges, and headquarters for multinational corporations in major cities help explain how such citiesavoid participation in global processes and decision makingare linked globally in ways that transcend national political boundariesare isolated and dependent on national political boundaries for securitypreserve cultural heritage and contribute to increasing isolation
The presence of media hubs, coalitions focusing on specific environmental challenges, and headquarters for multinational corporations in major cities can contribute to the isolation of these cities in a few different ways.
Firstly, these cities may avoid participation in global processes and decision making because they are able to shape their own narratives and priorities through their media and corporate influence. Additionally, these cities may be linked globally in ways that transcend national political boundaries, making them less reliant on their national governments for support and more focused on their own interests. However, this can also make these cities more isolated and dependent on national political boundaries for security, as they may lack the support and protection of a larger national network. Finally, the emphasis on cultural heritage in these cities can contribute to increasing isolation, as they may prioritize preserving their unique cultural identity over engaging with the global community.
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Approximately how many of the buildings in Goma, Zaire, were destroyed by a lava flow in January 2002?
which of the following is most useful in allowing us to learn about clouds of intergalactic gas? which of the following is most useful in allowing us to learn about clouds of intergalactic gas? spectra of stars in our own galaxy x-ray images of galactic winds quasar spectra composite visible, x-ray, and radio observations of light emitted by these clouds
Composite visible, x-ray, and radio observations of light emitted by these clouds are most useful in allowing us to learn about clouds of intergalactic gas.
By combining observations across multiple wavelengths of light, astronomers can gain a more comprehensive understanding of the properties and behavior of these clouds, including their temperature, density, and composition.
Visible light observations can reveal the presence and movement of ionized gas, while X-ray observations can detect very hot gas and high-energy phenomena like galactic winds.
Radio observations can provide additional information about the distribution and movement of neutral gas, as well as the magnetic fields that shape these clouds. By combining these different types of observations, astronomers can build a more complete picture of the intergalactic gas that fills the vast spaces between galaxies.
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One potential argument for the claim that personality seems to matter less in collectivistic cultures is thata.More autobiographies are written in collectivist culturesb.Chinese students often call their professors by their first names where as American students do not.c.Social hierarchies are more important in individualistic culturesd.The Chinese language has far fewer trait words than the English language.The idea that, in time, you can get used to almost anything is associated with which learning mechanism?a.classical conditioningb.operant conditioningc.habituationd.respondent conditioning
One potential argument for the claim that personality seems to matter less in collectivistic cultures is that d. The Chinese language has far fewer trait words than the English language.
This suggests that collectivist cultures, showcased by Chinese language, may place less emphasis on individual personality traits compared to more individualistic cultures, like American culture. The idea that, in time, you can get used to almost anything is associated with c. habituation. Habituation is a learning mechanism that involves a decrease in response to a stimulus after repeated exposure, allowing individuals to adapt to their environment.
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Distinctive rock sequences of basalt and marine sedimentary rock that may be slices of the ocean floor are:a. guyots. b. ophiolites. c. seamounts. d. fracture zones.
Your question is about distinctive rock sequences of basalt and marine sedimentary rock that may be slices of the ocean floor. The correct answer is: b. ophiolites.
Ophiolites are sequences of rock that typically include layers of basalt and marine sedimentary rocks. They are thought to be remnants of the oceanic crust and upper mantle, which have been uplifted and exposed on land due to tectonic processes.
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select consequences to a river when a dam is constructed. multiple select question. water released from the dam is clear (no sediment) and has a new capacity to erode and transport sediments downstream. the dam creates a temporary base level for the river. the dam causes the river to deposit its sediment load upstream of the dam. a reservoir is created, providing new and better habitats.
When a dam is constructed on a river, it can have various consequences on the river's ecosystem. One of the consequences is that water released from the dam is usually clear and has a new capacity to erode and transport sediments downstream. This can result in erosion downstream and changes to the river's channel morphology.
Another consequence is that the dam creates a temporary base level for the river, which can affect the downstream river processes. Moreover, the dam can cause the river to deposit its sediment load upstream of the dam, which can change the river's sediment transport and deposition patterns. However, a reservoir is created behind the dam, which can provide new and better habitats for aquatic organisms.
The creation of the reservoir can also provide a new water source for human activities such as irrigation, hydroelectric power generation, and recreational activities.
In summary, while dams can provide various benefits, they can also have significant impacts on the river ecosystem, and careful planning and management are required to ensure that these impacts are minimized.
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The construction of a dam results in changes to a river's sediment flow and course, creating a reservoir and altering local habitats. Despite the potential for improved habitats for some species, dam construction can have adverse effects on other organisms and therefore careful planning is necessary.
Explanation:When a dam is constructed on a river, there are a number of consequences. First, the water released from the dam is often devoid of sediment, giving it a new capability to erode and transport sediment downstream. Secondly, the dam creates a temporary base level for the river as the river's flow is impeded, causing the deposited sediment to accumulate upstream of the dam. This can result in significant changes in the river's course.
Additionally, the dam forms a reservoir which can alter local habitats, sometimes providing new and better habitats for some species, while adversely impacting others.
Despite these changes, dams also provide crucial services such as energy generation, water storage, and flood control. However, consideration of environmental consequences is essential in planning and operating these structures.
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The brightest star in the sky tends to be ____. A very luminous B. the hottest C. near us D. all of the above
False. The brightest star in the sky, Sirius, is not the hottest or most luminous star. It appears brightest because it is relatively close to Earth, only 8.6 light years away.
The brightest star in the sky is Sirius, which is also known as Alpha Canis Majoris. It is located in the constellation Canis Major and has an apparent visual magnitude of -1.46, making it about 25 times more luminous than the sun. Sirius is also one of the nearest stars to our solar system, at a distance of about 8.6 light years. It is a main-sequence star that is about twice as massive as the sun and has a surface temperature of about 9,940 Kelvin, making it one of the hottest stars visible from Earth.
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__________ is a deep, bowl-shaped depression produced by glacial erosion.
Answer:
Cirque
Explanation:
Cirque. A bowl-shaped, amphitheater-like depression eroded into the head or the side of a glacier valley. Typically, a cirque has a lip at its lower end.
What is thought to be the source of magma for most intraplate volcanism?
The source of magma for most intraplate volcanism is thought to be mantle plumes.
Located deep below the Earth's mantle, a mantle plume is a column of heated, upwelling mantle rock that rises to the surface. The underlying rock may melt as the mantle plume rises, creating lava.
A volcano then erupts as the magma rises through the Earth's crust. Far from plate boundaries, where there is little tectonic action to produce magma, intraplate volcanism can occur.
Mantle plumes are believed to be the main source of magma in these areas. The Hawaiian Islands and the Yellowstone hotspot are two examples of intraplate volcanic phenomena connected to mantle plumes.
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