Part I: Outcrops
Here are 9 outcrops of rocks that show sedimentary structures of some kind. Thoroughly explore each scene to determine which sedimentary structures are present. (1) Identify them, and then (2) interpret them [i.e., (a) how they formed, (b) what they reveal about geopetal “up” direction or current direction].
Outcrop 1:
Outcrop 2:
Outcrop 3:
Outcrop 4:
Outcrop 5:
Outcrop 6:
Outcrop 7:
Outcrop 8:
Outcrop 9:
Part II: Hand samples
Examine these 19 samples of rock showing various sedimentary structures and: (a) identify them and (b) interpret them.
Sample 1:
Sample 2:
Sample 3:
(Note: The little black curled lines here are the shells of small arthopods –shrimplike creatures– called ostracodes. Consider these hemispherical structures as sedimentary particles, as you would grains of sand.)
Sample 4:
Sample 5:
Sample 6:
Sample 7:
Sample 8:
Sample 9:
Sample 10:
Sample 11: (FYI, the little dash-shaped features that mainly run from left to right are gypsum casts)
Sample 12:
Sample 13:
Sample 14:
Sample 15:
Sample 16:
Sample 17:
Sample 18:
Sample 19:
Please submit your answers to the instructor.
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