b. The changes in rock types shown above are caused by cyclic fluctuations in sea level. What parts of the sequences represent transgressive portions of the cycle and what parts represent regressive portions of the cycle?
b. The changes in rock types shown above are caused by cyclic fluctuations in sea level. What parts of the sequences represent transgressive portions of the cycle and what parts represent regressive portions of the cycle?
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Question
Give an answer to B

Transcribed Image Text:a. Correlate the rock sequences below using solid lines.
Southeast Nebraska
Illinois
Western Pennsylvania
Arkose
-Disconformity
Shale
Limestone
Coal and soil layers
Arkose
-Disconformity
BIE
b. The changes in rock types shown above are caused by cyclic fluctuations in sea level. What parts of
the sequences represent transgressive portions of the cycle and what parts represent regressive portions
of the cycle?
c. Why might the limestone beds be thinner and the coal beds be thicker in the eastern rock exposures?
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