Explain which type of melting (flux, decompression, heat transfer) is responsible for mafic magmas in each of the following plate-tectonic settings and why the resulting magma is mafic.
a) Mid ocean ridges
b) Continental drifts
c) Oceanic and continental volcanic arcs
d) Hot spots

Answers

Answer 1

Answer:

a) Mid ocean ridges

Explanation:

The mid-oceanic ridges underling the hot asthenosphere which creates a depression that causes the melting of the peridotites at shallow depths. As they rise that results in mafic magma and this only takes place at divergent boundaries. Here the plates sperate and move away, causing magma below to rise and ill spaces of low pressure. The rocks then cool and new crust is firmed. The mafic rocks crystallize at higher temperatures and pressure.

Related Questions

What geographic information about South America can be determined using the map?
A)
the route of the Amazon River
B)
the height of the Andes Mountains
C)
the location of population centers
D
)
the total population of South America

Answers

C . Location of population centers

The location of population centers of South America  can be determined using the map. Thus, the correct answer is option C.

What is a population center ?

In demography, the centre of population of an area refers to the geographic location that best captures the region's population centre. Such a "central point" might be defined in various ways, each of which leads to a distinct place.

Brazil accounts for about half of South America's population with a population of over 200 million. After Brazil, there are 50 million people in Columbia, 44 million in Argentina, 31 million each in Peru and Venezuela, and 50 million in Columbia.

The largest city in South America is Sao Paulo, Brazil, which has 12 million residents. Lima, Peru, has 8.9 million, and Bogotá, Columbia, has 7.9 million.

Therefore, the geographic information about South America can be determined using the map is the location of population centers.

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Regional geography lays emphasis on the distinctiveness of a particular place and the characteristics that make up that location. With specific examples from Ghana and knowledge acquired in the regional geography of Ghana course discuss the above statement

Answers

Answer:

Ghana is found in the Western region of Africa. Its geography is divided into four major zones.

The coastline which is sandy with plains and scrub with rivers and streams.

The high plains are found in the northern part of Ghana.

Ashanti uplands and plateau which are found in the South-west and south-central part of Ghana

The hilly Akwapim-Togo ranges are found along Ghana's eastern international border

1. Which countries in East Africa have high temperatures for much of the year?

Answers

Answer:

Sudan, Djibouti, and Somalia have high temperatures for much of the year.

Explanation:

You are spending the month of July hiking and biking in the Rocky Mountains, in the western US state of Colorado. Based on concepts, explain why you would typically plan your daily rides and hikes in the morning hours to minimize the chances of being caught in bad weather?

Answers

Answer:

The answer is given below.

Explanation:

This may be because mostly during summertime, the intense temperatures of sunlight help to prevent an unstable climate because the excess heat of the surface wind is being warmed up as well as migrate up to meet cold air throughout the wind upwards which prevent storms across high ground. It is also a good idea to go out on a camping or riding bikes mostly in mountains during the summertime.

So, the following are the reason that describes the following scenario is correct.

which layer of Earth is composed of both the crust and the rigid mantel?

Answers

Answer:

Lithosphere

Explanation:

The lithosphere is the strong,external piece of the earth,stretching out to a profundity,and it incorporating both the coolest and the most investing of earths layers

Answer: The lithosphere is the solid, outer part of the Earth, extending to a depth of about 100 kilometers (62 miles). The lithosphere includes both the crust and the brittle upper portion of the mantle. The lithosphere is both the coolest and the most rigid of Earth's layers.

Explanation:

what are the countries which conducted census in five years ​

Answers

Answer:

most countries, population censuses are conducted once every 10 years. In some countries such as Japan, Australia, Ireland, New Zealand, and Canada, censuses are conducted more often, every 5 years.

Which of the following is an example of a climate region in the Eastern Mediterranean? a. Arid c. Mediterranean b. Semi Arid d. All of the above

Answers

it's C Mediterranean

2 Points
Why is there a large difference between the type of vegetation found on Bali
and that found on Lombok?
A. The islands are separated by hundreds of miles of desert.
B. The islands' economies operate very differently
c. During the last ice age, only Lombok was isolated from Asia,
D. Lombok has a completely different climate than Bali
SUBMIT

Answers

Answer:

C.

Explanation:

just took the quiz.

There is a large difference between the type of vegetation found on Bali and that found on Lombok was during the last ice age, only Lombok was isolated from Asia, The correct option is (C).

What do you mean by the vegetation of Bali?

Cultivated plants make up the majority of the vegetation of Java and Bali. Along the coast are mangrove, swamp, and Nipa fruticans forests. Subalpine and alpine vegetation predominates in mountainous areas.

The mixed lowland and hill tropical rainforest, which grows below 5,000 feet, is the most significant vegetation type (1,500 metres). It is characterized by a variety of species, such as trees with thick, woody stems and lofty canopies (climbing plants).

Indonesia's unique blend of Asian, Australian, and Indonesian lineages can be seen in its flora. This is a result of Indonesia's geographic location between the aforementioned continents.

Therefore, there is a large difference between the type of vegetation found on Bali and that found on Lombok was during the last ice age, only Lombok was isolated from Asia,

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The Cascade Range is also known as the

Answers

Answer:

the Cascades

Explanation:

because the Cascades range is a major mountain range and honestly I'd assume most people wouldn't call it by the full name so just like with most things they decided to shorten the name

Answer:

Cascades

Explanation:

Did research and this is what I found. Hope this helps!

What is the "Reverse" of a fossil fuel?​

Answers

Answer:

Dead bodies of plants and animals that lived on earth millions of years ago.

    HOPE IT MAKES UR DAY BETTER!!

How does carbon move between the atmosphere, hydrosphere, biosphere, and geosphere?
Explore: Use the Gizmo to create a path for carbon that begins and ends in the atmosphere. Finally, summarize very briefly how the carbon atom got to that location.
Create: Click Reset. Use the Gizmo to create a path in which the carbon atom goes from the atmosphere to the hydrosphere, biosphere and geosphere. Describe each transition briefly.
Atmosphere Hydrosphere Biosphere Geosphere
Atmospheric CO2 Ocean Marine plants/algae Sediments
Volcanoes, burning Rain water During photosynthesis, Uneaten plants and algae
fossil fuels, and breaks down marine algae and plants drift down to the ocean
other sources exposed rocks remove carbon dioxide floor and becomes apart
of marine sediments
1. Explain: Based on the Gizmo, explain how the following transitions might take place?
2. Describe at least two ways that carbon can get from a land plant to the atmosphere.
3. Describe at least two ways that carbon can get from the atmosphere to the hydrosphere.
4. Can you find two ways that carbon can get from the ocean to the lithosphere?
5. Describe at least two ways that carbon can get from seashells to the atmosphere.

Answers

Answer:

See it in the explanation

Explanation:

1) Carbon moves from atmosphere to hydrosphere and biosphere in the process of photosynthesis and to lithosphere by deposition of dead bodies while from hydrosphere and biosphere, carbon can be move in the process of respiration by animals.

2) During respiration process which takes place in plants in which carbondioxide is released and by eating carbon containing food by animals. By decomposing the food, carbon is releases in the form of carbondioxide.

3) Carbon can be used by the marine plants in the process of photosynthesis and during the process of diffusion, carbon is also dissolve in water bodies.

4) When the plants and animals die, the carbon which is present inside their body is buried in the soil present at the bottom of the ocean and the shells and corels of some animals also contain carbon which is soon be the part of the lithosphere when they die.

5) After the decomposition of seashell, carbondioxide is produced because shells are made up of calcium carbonate.

The carbon cycle refers to the movement of carbon throughout all spheres in the environment.

The carbon cycle is one of the biogeochemical cycles in nature. Biogeochemical cycles are cycles in which essential elements move through the different spheres of the environment.

Carbon enters the atmosphere through respiration of animals. Generally plants trap carbon dioxide from the atmosphere via photosynthesis. This is how carbon enters the biosphere. In the hydrosphere, oceans dissolve carbon dioxide as bicarbonate ions which serve as buffer in the oceans. This is how carbon enters the hydrosphere. Also rain drops dissolve carbon dioxide as it falls. Carbon enters the geosphere through decomposition of biomass.

Carbon gets to the land plants to the atmosphere when the plant dies, decays and carbon dioxide is produced. When plants are burn, carbon dioxide is also released to the atmosphere.

Carbon can move from the land to the atmosphere through combustion of matter and respiration of animals. Carbon can get from the atmosphere to the hydrosphere by dissolving directly into oceans or through rain water.

Carbon gets from the ocean to the lithosphere through the carbonaceous shells of some marine organisms and through fossil fuels and rocks that form in oceans.

Carbon can get from seashell to the atmosphere when the shells are burnt or the organism dies, decay and CO2 is returned to the atmosphere.

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What city is in the centre of britan?

Answers

Answer:

The Town of Haltwhistle

Explanation:

has banners saying it is the center of Britain

I believe it would be derby or something around the outskirts.

Please select the word from the list that best fits the definition

government in which monarchs hold total power over the people.

Answers

Answer:

absolute monarchy

Explanation:

this is where a monarch holds absolute control of the people

Answer: Absolutism

Explanation:

I got it right :)

hope this helps

Discuss the emphasis on the distinctiveness of a particular place and the characteristics or activities that make up that location in Regional geography?​

Answers

Answer:

Discuss the emphasis on the distinctiveness of a particular place and the characteristics or activities that make up that location in Regional geography?

Week Three: Intro to Rocks / Igneous Rocks1. From Activity 4.5 (p.121), place an "X" in the table to indicate what rock group is characterized by each of the processes and rock properties (hint: there is only one rock type for each process/rock property). (5 pts)Processes and Rock Properties Igneous Sedimentary MetamorphicLithification of sediment Intense heating (but not melting) Crystals precipitate from water Solidification of magma/lava Melting of rock Compaction of sediment Folding of rock Crystalline Foliated Common fossils 2. From Activity 5.5 (p.143), analyze and classify the igneous rock pictured below (sample 44 of your rock kit). Infer the origin of the rock based on its texture. (5 pts)-Mafic color index (% of mafic mineral crystals): -Would you describe the rock as mafic, intermediate, or felsic? -Texture present (i.e. phaneritic or aphanitic): -The name of this rock is:-Based on its texture, how did this rock form (i.e. intrusively or extrusively)? Use your textbook and rock samples to answer the following questions.3. Look at Bowen’s Reaction Series (figure 4.20 on p. 110 of your textbook). Lay your mineral samples on a white sheet of paper in the same arrangement as the minerals are presented in the figure, and take a picture. Paste the picture below

Answers

Answer:

Explanation:

1. Lithification of sediment = Sedimentary rock

Intense heating (but not melting) = Metamorphic rock

Crystals precipitate from water = Sedimentary rock

Solidification of magma/lava = Igneous rock

Melting of rock = Igneous rock

Compaction of sediment = sedimentary rock

Folding of rock = Metamorphic rock

Crystalline= Igneous rock

Foliated = Metamorphic rock

Common fossils = Sedimentary rock.

Which statement BEST explains how the deforestation of the Amazon River Basin could negatively affect the world?
A)
Deforestation could lead to an increase in poverty rates
B
Deforestation could lead to reduced air quality.
Deforestation could increase water pollution
D
Deforestation could affect tourism

Answers

B . Deforestation could lead to reduced air

The statement that explains how the deforestation of the Amazon River Basin could negatively affect the world is that deforestation could increase water pollution. The correct option is c.

What is deforestation?

Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to a non-forest use. Deforestation can involve the conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.

About 31% of Earth's land surface is covered by forests at present. This is one-third less than the forest cover before the expansion of agriculture, with half of that loss occurring in the last century. Between 15 million to 18 million hectares of forest, an area the size of Bangladesh, are destroyed every year. On average 2,400 trees are cut down each minute.

The Food and Agriculture Organization of the United Nations defines deforestation as the conversion of forest to other land uses.

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