facies changes

The textural and compositional changes that occur laterally and/or vertically within related rock bodies.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …   Universalium

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