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Reptiles evolved before amphibians.

During the Late Cretaceous, arctic water spread southward over North America, forming an inland sea called the:

Rifting between Laurasia and Gondwana caused:

Repeated deposits of marine and nonmarine stratigraphic layers are called:

What would occur if all of the ice on Greenland and Antarctica melted?​

Why is the Sonoma Orogeny and its formation unique?

During the Mesozoic, angiosperms first evolved, and today they are ______ of present-day plant species.

Black shale formation was driven by specific conditions, including _______ organic content and water with ________ free oxygen.

What happened to ocean circulation after the break up of Pangaea?

The Franciscan Complex, unique because it has sedimentary, igneous and metamorphic rocks, formed during the _________ orogeny.