...granitic and syenitic rocks, in the form of gneiss, mica slate, and hornblende slate ; and secondly, of a stratified series composed of quartz rock or...and limestones, with interposed beds of greenstone." Of the fossiliferous groups following these, six formations were met with, which, in the New York nomenclature...

...granitic and syenitic rocks, in the form of gneiss, mica slate, and hornblende slate ; and secondly, of a stratified series composed of quartz rock or...and limestones, with interposed beds of greenstone." Of the fossiliferous groups following these, six formations were met with, which, in the New York nomenclature...

...series, composed of granitic and syenitic rocks in the forms of gneiss, mica-slate, and hornblende-slate; and, secondly, in ascending order, of a stratified...interposed beds of greenstone. The first of these series ie in so highly a disturbed condition, and is so much contorted that it is impossible to ascertain...

...gneiss, mica slate, and hornblende slate; and, second, in the ascending order, of a stratified scries, composed of quartz rock or sandstones, conglomerates,...islands, between Little Lake George and Shebawenahning. There was no opportunity of determining the breadth of country this series occupies and the thickness...

...granitic and sycnitic rocks in the forms of gneiss, mica slate, and hornblende slate; and, second, in the ascending order, of a stratified series, composed...impossible to ascertain its thickness. The second scries occupies the whole north coast of Lake Huron, with many of its neighboring islands, between...