Please TYPE your answer. Thanks. This scene in Montana\'s Glacier National Park

Question

Please TYPE your answer. Thanks.

This scene in Montana's Glacier National Park shows layers of Precambrian sedimentary rocks. The darker layer contained within the sedimentary layers is igneous. The narrow, light-colored areas adjacent to the igneous rock were created when molten material that formed the igneous rock baked the adjacent rock.

a) Is the igneus layer more likely a lava flow that was laid down at the surface prior to the deposition of the layers above it or a sill that was intruded after all the sedimentary layers were deposited? Explain.

b) Is it likely that the igneous layer will exhibit a vesicular texture? Explain.

c) To which group (igneous, sedimentary, or metamorphic) does the light-colored rock belong? Relate your explanation to the rock cycle.

Please TYPE your answer. Thanks.

Explanation / Answer

a) an igneous sill was intruded after all the sedimentary layers were deposited.And sill is diorite rock (intrusive igneous rock)
b)comes to the vesicular texure,it does not has because it is not a valconic rock,only volcanic rocks can show the vesicular texture.

c)The light colored rock belongs to metamorphic(metasedimentary rock)group,here surrounding rock(limestone) turns to be marble(metasedimentary rock) due to precence of heat from sill.

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