Primary Sedimentary Structures
(continued)

Mudcracks

- (desiccation cracks)

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Recent mudcracks along a dried up stream bed

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Silurian mudcracks on the bottom of a sandstone bed

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Biogenic Structures

- Bioturbation
- Trace Fossils

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Bird Track

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Snake Trail

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Feeding Trace

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Burrow

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last updated 1-2-98

All original material copyright (c) 1998 by Annabelle Foos. All rights reserved.