Exam 3: Rocks

The three categories used by geologists to describe how rocks form are __________, __________, and __________ rock.

Igneous rocks that have a composition between __________ and __________ are termed intermediate.

Sedimentary rocks cover about __________ percent of the Earth's continents.

Most of the Earth's limestone is composed from __________.

__________ is a parallel fracture pattern that cuts through original sedimentary bedding in metamorphic rocks.

Major crustal movements build mountains and deform rocks in a process known as hydrothermal metamorphism.

Sandstone, siltstone, and shale are __________ rocks.

Basalt is mineralogically identical to gabbro.

An example of a metamorphic change in which the new rock has a new texture, but the same minerals, is the transformation of __________ to __________.

As peat is buried and compacted by overlying sediment, it converts to __________.

Metamorphic rock forms when:

Regional dynamothermal metamorphism refers to metamorphism:

Igneous rocks that solidify within the Earth's crust are __________.

Which of these igneous rocks is the most abundant rock type in oceanic crust?

__________ form in sediment by wind, water currents, or waves.

About 5 percent of the Earth's crust is made of:

__________ __________ occurs where hot magma intrudes cooler rock of any type-sedimentary, metamorphic, or igneous.

Granite is an example of a/an __________ rock.

Basalt consists of approximately equal amounts of __________ and __________.

The same mineral that solidifies slowly to form granite can also erupt to form __________.