Question

Describe how sedimentary rocks record clues to help geologist interpret the past.

Answer 1

Ans.

The sedimentary rocks are formed of sediments as the name suggests. hence they are formed when layers of sediments get deposited one over another and in between them, fossils are sandwiched. These sandwiched fossils are helpful to the geologists to interpret the past and they can understand what sort of flora and fauna existed in those times.

Let's understand this thing with the help of an example -

you find a sedimentary rock in your region, when you dig it, in the first layer, you find out a skeleton of sparrow. Again, you dig it, another black layer comes up where fossils of a dinosaur is seen, again you dig it up and you find out marine fossils.

Hence, you can conclude that this region has gone through various phases, the first phase had marine environment, the second phase had dinosaurs living here and the third phase is having sparrows.

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