History of Physical Geology

1.Physical Geology:

-It is the study of the earth's rocks,minerals,soils and how they have formed through time.

-Complex internal process such as plate tectonics and mountain-building have form these rock and brought them to the earth's surface.

-Earthquakes are the result of the sudden movement of  crustal surface releasing internal energy that becomes distructive at the surface.Internal heat and energy release also through volcanic eruption.

-External process such and glaciation,running water,weathering,erosion have form the landscape we can see now.

-About 2300 years ago,the Greeks, led by the philosoher Aristotle were among the first who try to understand the earth.During 1600s and 1700s scientists believed the earth had been produce by gigantic ,sudden catastrophoic event that build mountains,oceans,canyons etc.

-In the late 1700s, James Hutton, a Scottish doctor, proposed that the physical processes that shape the world today also operated in the geologic past—a principle known as uniformitarianism. Another early concept was the law of superposition—in an undeformed sequence of sedimentary rocks, each layer is younger than the ones below it and older than those above it. The law of faunal succession states that fossils in these rocks occur in the same kind of order, and changes in fossil content represent changes in time. Thus, rocks from different parts of the world containing the same type of fossil formed about the same time. English geologist Charles Lyell enlarged on these ideas and modernized geology with his series of books in the mid to late 1800s.

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