The figure below represents sedimentary layers in a single geographic location. Use
the diagram below to answer the question.
06:09
Layer C is a fine-grained sandstone with cross-bedding and land animal fossils. No
marine fossils are present. Under what conditions did it most likely form?
a) Fine sands are generally deposited by wind. The absence of marine fossils and the presence of land animal
fossils suggest that the area was dry, sandy land, such as a desert.
b) Graded bedding is found as a result of underwater landslides. The presence of marine fossils confirms that
the area was under the sea at one time.
U
C) The presence of marine fossils in a limestone confirms that this rock layer formed in an ocean.
u
d) None of the above
