Why might metamorphic rocks be more likely to show bands of color than igneous rocks?

Answer 1

Some metamorphic rocks display foliation, a distict banding due to the alignment of like minerals due to high pressures and temperatures. Igneous rocks , especially those that form below the ground from cooled magma are more homogenous in appearance because of the interlocking crystalline structure among the composite minerals.

Answer 2

Heterogeneous rock types like granite, will form banding under intense heat and pressure as is experienced during metamorphosis. The banding is a result of compression stress causing a parallel alignment of the rock's minerals. Igneous rocks are formed from the solidification of magma, and therefore do not exhibit banding or layering.

Answer 3

Metamorphic rocks are all of the rocks put together.

Igneous rocks are from volcanos, and they don't come very often.

Sedimentary happens over time, it's when some rocks smush together.

Answer 4

Metamorphic rocks are more likely to show bands of colors than other rocks because they arise from the transformation of existing rocks, due to extreme heat and pressure. The bands are created during this change as the minerals are segregated into bands.

Answer 5

Metamorphic rocks can exhibit banding due to the realignment of minerals within them. The realignment occurs as the parent rock is subjected to heat and pressure from the depth of their burial, or from forces caused by plate tectonic movements. The bands form at right angles to the stresses being applied. Igneous rocks that have not metamorphosed have not been subjected to these stresses.

Answer 6

From great pressure and heat exerted on them as a result of plate collisions.