Subject ASC0003t7y
The geological magazine, or, Monthly journal of geology.
Decade 3:v.3 (1886), Page 287 (1886)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32502850
Keywords
section Canada New York Pennsylvania Lower Silurian Upper Silurian Devonian Sub-Carboniferous successive shore line successive sea levels development contionent north american cross section canada new york pennsylvania geology sea level shoreline united states cross-section