As understood by modern geologists,the principle of uniformitarianism implies that
A) the Earth has always had the same basic appearance that it has today.
B) igneous,metamorphic,and sedimentary rocks are uniformly mixed throughout the crust.
C) physical processes observed today (such as erosion and volcanic eruptions)have been active in the past at approximately the same rates.
D) physical processes observed today (such as erosion and volcanic eruption)occurred much more rapidly in the past,quickly sculpting the Earth's surface.

Question

Quizplus · Accepted Answer

The principle of uniformitarianism states that physical processes observed today have been active in the past at approximately the same rates. This means that erosion, volcanic eruptions, and other geologic processes that we observe today have been shaping the Earth's surface over long periods of time in a gradual and continuous manner. It does not imply that the Earth has always had the same basic appearance, or that rocks are uniformly mixed throughout the crust. It also does not imply that physical processes occurred much more rapidly in the past.

As Understood by Modern Geologists,the Principle of Uniformitarianism Implies That