How is a sill different from a dike?
A. The sill is tabular in shape.
B. Dikes are intrusive structures.
C. A sill is shaped like a mattress, while a dike is shaped like a pillow.
D. Sills are parallel to the layering in the country rock.
E. Dikes are fine-grained and sills are coarse-grained.
Answer: D
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