Exam 12: Earth S Internal Structure, rock Cycle, and Geologic Time

What is the most common rock in the continental crust?

Molten rock beneath the Earth's surface is

The Precambrian accounts for roughly 50% of Earth history.

Rocks that form from the cementation and compaction of loose rock debris and organic matter are

Mountain building and extinctions mark the end of the eras of geologic time.

A dark-colored,extrusive igneous rock with a mafic composition is __________.

If a batholith is located at the Earth's surface,that means overlying sedimentary rocks have been eroded away.

Identify whether the following rocks are either "intrusive" or "extrusive" and "felsic" or "mafic." Andesite [1] [2] Answer 1 Choices: Extrusive Intrusive Answer 2 Choices: Felsic Mafic

What is the most common rock in the oceanic crust?

___[1]_____ cover more time than ___[2]____,which cover more time than __[3]____.The geologic time unit that covers even less time is ___[4]____. Answer 1-4 Choices Eon Epoch Era Period

Identify whether the following rocks are either "intrusive" or "extrusive" and "felsic" or "mafic." Gabbro [1] [2] Answer 1 Choices: Extrusive Intrusive Answer 2 Choices: Felsic Mafic

Of the following,the longest is

The Sangre de Cristo Mountains are a batholith that has been exposed by erosion.

A naturally occurring oily liquid that consists of ancient hydrocarbons is

Which layer of the Earth is at the center and is solid?

Even though the temperatures inside the Earth are high enough to melt the materials,they can be solid because of the tremendously high pressures.

Oceanic crust is mostly

The oldest rocks in the Grand Canyon are metamorphic.

Metamorphism occurs when rocks become deeply buried or are near hot molten rock.

Magma that has moved vertically upward through a crack in the rock forms a(n)