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Laboratory Manual for Introductory Geology 4e

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FIGURE 6.16 Examples of depositional environments.

Glacial: unsorted sediment containing angular

clasts—commonly, such sediment may contain large

clasts suspended in a much finer matrix

Mountain stream

Alluvial fan: conglomerate and arkose

Delta

Swamp: coal

Shallow

marine

Fluvial (river): channels of

sandstone or conglomerate, in

some places surrounded by

layers of mudstone, and

hematite containing cement

Lagoon

Reef

Deep marine:

shale, chert,

micrite, or

chalk

Lagoon

Laminated mud

from a lake bed

Desert dune: well-sorted sandstone

with large cross beds

Reef

Beach: well sorted,

cross-bedded sandstone

168 CHAPTER 6 USING SEDIMENTARY ROCKS TO INTERPRET EARTH HISTORY

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