Chapter 2

clast size

Detrital sedimentary rocks are classified by ______.

Each rock is formed from magmas with different silica compositions

Granite, diorite, and gabbro are all intrusive igneous rocks. What makes them different from each other?

chemical; carbonate

Limestone is a _____ sedimentary rock, primarily composed of ________ minerals

lithification

The process by which loose sand from a beach or desert is converted into a solid rock called sandstone is an example of ______.

plutonic rocks have larger crystals

Volcanic rocks are different from plutonic rocks in that ______

igneous

What are the rocks that form from the cooling of magma?

clay

Which type of clast is the smallest?

It cooled quickly on Earth's surface

You observe a dark colored igneous rock with very fine crystals that are only visible under magnification. What can be said about this rock?

igneous, sedimentary, or metamorphic rock

According to the rock cycle, a sedimentary rock can be formed from a(n) ____

when deeply buried

Sedimentary rocks are most likely to lithify ______.