Subject ASC0003t9s
The geological magazine, or, Monthly journal of geology.
Decade 3:v.3 (1886), Page 65 (1886)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32502618
Keywords
geology talus uneroded slope geometry Note on the form of the uneroded surface of rock underneath a talus angle measure triangle math erosion surface mountain cliff