1. Reason backward from the following kinds of sediments or rocks to the environments in which they originated. There may be more than one possibility for each, depending on the description. How does the presence of fossils help in making your paleoenvironmental interpretations?
a. Shale
g. Coarse- grained sands with shallow- water clams grading fining upward into muds with planktonic foraminifera
j. Chalk ( calcareous ooze)
k. Calcareous, sandy muds containing abundant algal fragments, burrows, and root casts