Subject ASC0003spy
The geological magazine, or, Monthly journal of geology.
Decade 2:v.4 (1877) [Incomplete], Page 434 (1877)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32579367
Keywords
marl fossilferous sand gravel tuff valey of the timber pliocene ancient geology layers section tiber mountains pilocene