Flashcards in Chapter 11 Vocab Deck (21):
The late Paleozoic uplifts of the Rocky Mountain region; they eroded away long before the present Rocky Mountains formed.
The middle Precambrian Eon.
Banded iron formation (BIF)
Iron-rich sedimentary layers consisting of alternating gray beds of iron oxide and red beds of iron-rich chert.
Basin and Range Province
A broad, Cenozoic continental rift that has affected a portion of the western United States in Nevada, Utah, and Arizona; in this province, tilted fault blocks form ranges, and alluvium-filled valleys are basins.
The remarkable diversification of life, indicated by the fossil record, that occurred at the beginning of the Cambrian Period.
A long-lived block of durable continental crust commonly found in the stable interior of a continent.
A province in the interior of a continent in which Phanerozoic strata bury most of the underlying Precambrian rock.
Shallow sea overlying a continent.
A block of land that collided with a continent along a convergent margin and attached to the continent; the term exotic implies that the land was not originally part of the continent to which it is now attached.
A supercontinent that consisted of today’s South America, Africa, Antarctica, India, and Australia. Also called Gondwanaland.
The oldest of the Precambrian eons; the time between Earth's origin and the formation of the first rocks that have been preserved.
The mountain-building event that lasted from about 80 Ma to 40 Ma, in western North America; in the United States, it formed the Rocky Mountains as a result of basement uplift and the warping of the younger overlying strata into large monoclines.
A continent in the early Paleozoic Era composed of today’s North America and Greenland.
A supercontinent that assembled at the end of the Paleozoic Era.
The most recent eon, an interval of time from 542 Ma to the present.
Pleistocene Ice Age
The period of time from about 2 Ma to 14,000 years ago, during which the Earth experienced an ice age.
The most recent of the Precambrian eons.
A proposed Precambrian supercontinent that existed around 1 billion years ago.
An older, interior region of a continent.
A huge mantle plume.