The Paleozoic sedimentary record across the North American craton has been divided into unconformity-bounded cratonic sequences with names such as Sauk, Tippecanoe, Kaskaskia, and Absaroka. Each sequence documents what sort of events?
A. orogeny followed by deposition of a clastic wedge
B. evolution followed by extinction
C. opening and closing of an ocean basin
D. volcanic eruption and ash fall
E. transgression followed by regression

b

Explanation:

The Paleozoic, even though recent in occurrence, is the first stage of the Phanerozoic and it lasted the longest, starting about 570 million year ago, it begins and ends with a supercontinentThe most important events of the Paleozoic were the rising and falling of sea level over the continents. In a marine transgression, there is rise in sea levels ea level over the land, while in a marine regression sea level retreats. In this period of paleogeography, there are four complete cycles of marine transgressions and regressionsHence, the Paleozoic sedimentary rocks across the North American craton contain evidence of marine transgressions and regressi

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