Question

...................rock layer hold all reserves of coal,oil and natural gas​

Answer 1

Answer:

sedimentary rocks such as shale can contain large amounts of kerogen that can be extracted to obtain oil. This type of shale is known as oil shale. Natural gas can also be trapped in shale, and this type of gas is known as shale gas. As well, sedimentary rock is a common rock found in oil reservoirs.

Sedimentary rock layer hold all reserves of coal,oil and natural gas​

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Answer 2

Answer:

------rock layer hold all reserves of coal oil