Sedimentary Rocks

Sedimentary rocks, however, are the principal bank on which the fossil collector will draw. Knowledge of the principal types, the conditions under which they were formed, the relationships of the strata he will work in

Fossils in slate are often distorted. This trilobite, Ogygopsis klotzi, comes from Cambrian slates exposed on Mt. Stephen in British Columbia. It is flattened but shows little distortion otherwise.

the field, and the fossils he might expect to find in a specific sequence of sedimentary rocks is, therefore, part of the capital he will need if he is to make profitable use of his efforts.

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