Unlike catastrophism, _______ states that mountains formed slowly over time. William Smith was working as a surveyor in the late eighteenth century. He noticed that certain fossils were found in certain layers of sedimentary or igneous rock, that the same order of strata could be found in areas that were far apart, and these strata contained similar _______. The Permian Period lasted from 299 Ma to 251 Ma. This means that the Permian Period lasted _______ years.
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Answer:
charles layel and james hutton developed the concept of uniformitarianism.
Explanation:
UNIFORMITARIANISM:
ACCORDING TO THIS CONCEPT:
they believed that the earth landscape like mountains and oceans formed over long periods of time through gradual process.
the principal of uniformitarianism is that the present is the key to the Past ..
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