Which soil horizon contains unaltered to partially-altered parent materials? Hin

Question

Which soil horizon contains unaltered to partially-altered parent materials?

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Which soil horizon contains unaltered to partially-altered parent materials?

How might differential stress act as an agent of metamorphism to create a metamorphic rock?

a Differential stresses trigger chemical reactions that recrystallize old minerals as well as create new ones.
b Differential stresses release chemical fluids that enable ion migration, which can generate new crystals.
Even pressure on all sides will create a more compact, more dense rock.
c Differential stresses melt old minerals, which solidify into new rocks.
d Unequal pressures will deform a rock created of layers of flattened mineral grains.

Explanation / Answer

1] Option C horizon is correct

C horizon lies directly over the unaltered parent material and consists of parent material partially altered by weathering

2] Optin D is correct

Agents of metamorphism pressures differential stress applies force unequally and in different directions

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