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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.

Deltas form when streams or rivers encounter a standing body of water, such as an ocean or lake.

Organisms that live above the sea floor in the water column are found in the pelagic zone of the marine environment.

What flowering plants dominated the land ecosystems during the Late Cretaceous?