Subject ASC0002ldo
The Quarterly journal of the Geological Society of London.
v.9 (1853), Page 88 (1853)
Smithsonian Libraries
BHL Page 34983191
Keywords
strata bed superposition potsdam sandstone trenton limestone gneiss river montmorenci mound bridge bank layer crest gulley natural steps slope cliff brink falls st. lawrence geology Potsdam sandstone Trenton limestone River Montmorenci landcape sandstone river