Which statement describes the law of superposition when used to find the relative age of fossils in rocks? -Fossils inside a layer of a rock are older than the surrounding rock.
-Fossils in bottom layers are older than fossils in top layers.
-Fossils were formed during a time when chemical processes operated differently.
-Fossils of the same organism found at different locations formed in similar climates.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.