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Physical geology
Introduction
Pages 1-6
Mark J. Crawford,.
Physical geology
•is the study of the earth's rocks,
minerals, and soils and how they have
formed through time.
• Internal processes such as plate tectonics and
mountain-building have formed these rocks and
brought them to the earth's surface . Internal
heat and energy are released also through
volcanic eruptions.
• External processes such as Glaciation,
running water, weathering, and erosion have
formed the landscapes we see today.
Historical Notes
• About 2300 years ago, the Greeks, led by
the philosopher Aristotle were among the
first to try to understand the earth.
• During the 1600s and 1700s, scientists
believed the earth had been produced by
gigantic, sudden, catastrophic events that
built mountains, canyons, and oceans.
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