A geologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. As he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. He now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. As he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. He concludes:

Question

Nikolai Garrison

Geography

21 January, 00:39

A geologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. As he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. He now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. As he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. He concludes:

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Answers (1)

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Alessandra Sanders · Answer 1

Formation of an oil well.

Explanation:

As the geologist is working on an area that has exposed sedimentary rocks and finds the sequence of the ricks arranged in a stratified form he sees as a thick sequence of the limestone and an abundant amount of the fossil beds. The limestone made up of the corals is interbred with the presence of the shale that consists of the same fossils that he found about 50 km away. And thus he concludes that the sedimentary rock of shale may be involved in the formation of an oil well.