BUILDING AND ORNAMENTAL STONES. 



309 



E.— GEOLOGICAL ItECOKD ; 



ORDER OF SUCCESSION OF 





^2 



s o 



1^ 



a 



a 



° 2 V. * 

 >S '^ 



^« 







Pm 



>° 



THE ROCKS 

 CRUST. 



COMPOSINO THE EARTH'S 



SEecont, or Terrace. 

 Champlain. 

 Glacial, or Drift. 



u a 





j> Tertiary. 



Cretaceous. 



) Jurassic. 



Triaasic. 



Permian. 

 Carbon! fevouH. 



Subcarhoijjifcrous, 

 1 Catskill. 

 Chemung. 



)^ Hamilton. 



Corniferous. 

 J 

 ^ Oriwlcany. 



Lower Helderberg. 



Salina. 



Niagara. 



Cambrian, 

 or Pri- 

 mordial. 



Trenton. 



Canadian. 



\ Upiier. 

 [Middle. 

 J Lower. 



ArchsBan, Pre-Cambrian. 



Pliocene. 

 Miocene. 

 Eocene. 



Laramie. 



S Upper. 

 Middle. 

 Lower. 

 Weal den. 

 Upper oolite. 

 Middle oolite. 



< Lower oolite. 

 Upper Lias. 

 Marlstone. 



, Lower Lias. 



SKeuper. 

 Muschelkalk. 

 Banter Sandstone. 



Permian. 

 ( Upper Coal-measures. 



< Lower Coal-measures. 

 ( Millstone Grit. 



5 Upper. 

 i Lower. 



Catskill. 



Chemung. 



Portage. 



Genesee. 



Hamilton. 



Marcellus. 



Coruiferous. 



Schoharie. 



Canda-galli. 



Oriskauy. 



Lower Helderberg. 



Salina. 



Niagara. 



Clinton. 



Medina. 



Cincinnati. 



Utica. 



Trenton. 



(Miazy. 



Quebec. 



(Jalcilerous. 



Potsdam. 



Georgian. 



St. John's. 



lluroiiian. 



Laurentian. 



