Name:  Chocolate "Marble"

Geologic Name:  Holston Limestone

Reference:  Gordon, C.H., Dale, T.N., Bowles, O., Marble deposits of East
Tennessee: Tennessee Div. Geology Bull. 28, p. 37-38, 1924.

Microscopic characters:  The rock is composed of calcite with a fine reddish
pigment like ferrite scattered throughout it.  Part of the calcite is distinctly
crystalline and part is in distinct orgainc fossil forms which may be coralline in 
nature.