Exam 23: Cenozoic Earth and Life History

Heat transfer from the equatorial regions to the poles ceased during the ____.

____________________ gold deposits are formed by stream deposits.

When did the last ice age begin?

Mammalian faunas of _____ were particularly hard hit by the Pleistocene extinctions.

Angiosperms constitute less than 90% of all land plants.

The evolutionary trend in mammal size during the Pleistocene could have been in response to ____.

The Cenozoic Era is divided into the ____.

During the last two million years, there have been at least ____________________ warm-cold cycles.

The Laramide orogeny involved little or no ____.

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

The major difference between modern humans and Neanderthals is ____________________.

How and when did the land that is the present state of Florida originate?

Primates lack the _____ found in other mammalian orders.

The Colorado Plateau has been affected by Cordilleran orogenic events.

The oldest hominids belong to the genus ____________________.

During the Cenozoic, brachiopods ____.

The age of oceanic crust in the Pacific is asymmetric because ____.

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

The oldest currently known homonid is ____.

The Early Tertiary sedimentary sequence of the Gulf Coastal Plain is ____.