Subject ASC0001hs4

The Quarterly journal of the Geological Society of London.
v.5 (1849), Page 356 (1849)
Smithsonian Libraries
BHL Page 35269006

Keywords

geology fossils coal shale roots tree fossil coal seam diagram side view section cross section underground tap roots fossil coal bed conical conical tap roots stump petrified wood fossil tree tree stump fossil tree stump fossil stump trees coal mines stumps tree tap root root underside regular branching Coal seam

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