These are different parts of a question.Kindly answer all of them as its the las

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These are different parts of a question.Kindly answer all of them as its the last question I have left with. I just need their brief answers in two or three lines in proper way. Thanks

Question 1 a. Quartz are with well-developed crystal faces. Does quartz always grow to show crystal faces? Why or why not? b. Is quartz always "crystalline"? Why or why not? c. What type of rock materials make up cinder cones? d. Discuss how it is possible to derive a granite from an originally basaltic magma. Explain concisely "magmatic differentiation." e. Discuss crustal assimilation, and relate it to the type of Earth locations where it normally occurs and the resulting igneous bodies formed thereby f. List 5 volcanoes of the Cascade Range. g. We learned earlier that feldspars are the most common minerals in Earth's crust. Why, then, is quartz the main constituent of sandy chemical and physical factors (of both minerals).

Explanation / Answer

A) yes it grows with crystal faces because quartz is having specific internal structure and ordered pattern of arrangement of molecules.

B) quartz is having definite internal structure. It is made up of SiO4. The pattern of arrangement is specific hence quartz is crystalline. If there is no difinite internal structure then it is called as amorphous.

C)the volcanic rocks forms the cinder cone.

Mainly pyroclastic material like volcanic ash, Lava blocks, scoria, tuff, pumice etc.

D) the basaltic magma is more viscous or denser. When it rises toward the crust, some of the magma stops in the crust which increase the temperature in the crust produces melting of crustal rock which is rich in silica and produces the silica rich magma/ granitic magma.

Now if this silica rich magma or granitic magma rises on the surface then it forms rhyolite but if it cooled in the crust then it forms granite

the processes by which magma changes its compositon is called as magmatic differentiation. There are different processes like fractional crystallization, crustal assimilation, magma mixing, magma immiscibility etc.

Fractional crystallization means the crystal are forming with their melting temperature

For example olivine crystallizes at 1800 degree Celsius.

Now we know that olivine is (MgFe) SiO4. If I remove MG or Fe elements because of pressure change or by liquid immiscibility(no mixing ex., oil and water) then whole composition changes this is called as magmatic differentiation.

E) this happens when magma from deeper source come in contact with wall rock of magma chamber then the crustal rock broken off will enter into the magma and dissolve into it. This is called as crustal assimilation. The xenolits found into some rocks are evidence of the crustal assimilation.

F) 1) mount Rainier 2) glacier peak 3) mount baker 4) Mount hood 5) Lassen peak

G) the both minerals are having different hardness, we know that quartz is more harder than feldspar hence iis resistance to weathering is harder hence quartz is never weaterhe easily on the other hand, feldspar weather's easily.

At beachs, both physical and chemical weathering occurs, now feldspar is less resistant can affected by water and converts to clay but quartz cannot convert hence at sandy beaches, quartz will be dominant.

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