Exam 23: Cenozoic Earth and Life History

The oldest australopithecines were ____________________.

The ____________________ orogeny resulted in the formation of the Himalayan Mountains.

The Cenozoic Era has been _______ years long.This is only _______ percent of all geologic time.

The oldest hominids belong to the genus ____________________.

Tertiary reservoirs of the Gulf Coastal Plain and southern California are important in U.S.petroleum production.

____________________ gold deposits are formed by stream deposits.

What is the North American Cordillera?

____________________ was a robust creature with a developed social structure.

What are the mountain ranges that have been produced by plate convergence associated with the Alpine orogeny?

The United States ranks first in global petroleum production.

Geologists know more about Cenozoic Earth and life history than about any other era of geologic time.

All but which of the following mountain ranges could be considered part of the Alpine chain?

Why might the abundance of marine diatoms be related to increased volcanism?

In what two ways was the Laramide orogeny different from other orogenies?

During the Pleistocene of North America,there were at least ____________________ glacial stages.These stages,in order from oldest to youngest,are the ____________________,____________________,____________________,and ____________________.

The adaptive radiation that led to evolution of diverse placental mammals began in the Late Cretaceous.

The group of hoofed mammals which are even-toed are the ____________________,while those which have an odd number of toes are the ____________________.

At their greatest extent during the Pleistocene,glaciers covered about ____________________ as much of Earth's surface as they do now.

What are streams that cut across ridges called?

The plate tectonic activity that gave rise to orogens around much of the circum-Pacific orogenic belt was ____________________.