Geology Flashcard

Front

The most common igneous rock is _?

Back

basalt

Front

An igneous rock that formed when magma began cooling slowly but finished cooling more quickly is a(n) _?_ rock.

Back

porphyritic

Front

What are hard, round sedimentary rock structures that form when minerals crystallize around a mineral fragment?

Back

concretions

Front

Which type of sedimentary rock is made from mechanical sediments?

Back

clastic sedimentary rock

Front

The most abundant sedimentary rock is _?

Back

shale

Front

A layer of sedimentary rock is called a(n) _?

Back

stratum (or bed)

Front

The branch of geology that is concerned with the origin, composition, and structure of rocks is _?

Back

petrology

Front

The general term for fuels derived from the remains of once-living things is _?_ fuel.

Back

fossil

Front

In surface mining of coal, the coal is exposed by removing the upper layers of ground, or _?

Back

overburden

Front

The type of sedimentary rock that consists of smooth pebbles in hardened sand or clay is _?

Back

conglomerate rock