LIST OF AMERICAN FORMATIONS. 



1513 



Cat Head limestone, Black River or Rich- 

 mond, Manitoba. 



Cataract formation, Upper Medinan, On- 

 tario and New York. 



Catheys formation, Trenton, Tennessee, 

 Kentucky, etc. 



Cayugan series or epoch, Silurian. 



Cedarville dolomite. Upper Niagaran, 

 Ohio. 



Central limestone ( = Murfreesbo ro), 

 Stones River, Tennessee. 



Chambersburg formation, Chazyan-Mo- 

 hawkian, Pennsylvania, Maryland, and 

 Virginia. 



Champlainic (=Ordovicic) system. 



Channahon limestone, Upper Medinan, 

 Illinois, etc. 



Charette limestone, Middle Ordovician, 

 Missouri. 



Charleton formation, Richmond, Anti- 

 costi Island, Quebec. 



Chazy shales (=Aylmer), Chazyan, Cana- 

 da. 



Chazyan series or epoch, Lower Ordo- 

 vician. 



Chepultepec limestone, Ozarkian, Ala- 

 bama. 



Chester amphibolites, Ordovician (?), 

 Massachusetts. 



Chicago group. See Lockport. 



Chickamauga limestone, Stones River to 

 Cincinnatian, Tennessee, Alabama, etc. 



Chicotte formation, Anticostian, Anti- 

 costi Island, Quebec. 



Chimneyhill limestone, Upper Medinan, 

 Oklahoma. 



Cincinnatian series or epoch, Upper Or- 

 dovician. 



Citadel series, Quebec group, Canada. 



Clarksville division (of Waynesville), 

 Richmond, Ohio Valley. 



Clermont shale, Richmond, Iowa and 

 Minnesota. 



Cliff limestone, Niagaran, Ohio Valley. 



Clifton limestone, Niagaran, West Ten- 

 nessee. 



Clinch Mountain sandstone See Clinch. 



Clinch sandstone, Upper Medinan, Ten- 

 nessee and Virginia. 



Clinton group or stage, Lower Niagaran. 



Cloche Island beds, Black River, On- 

 tario. 



Cobequid series, Silurian, Nova Scotia. 



Cobleskill (Coralline) waterlime, Upper 

 Cayugan, New York. 



Cobscook (Bay) series, Silurian, Maine. 



Cockeysville marble, Cambrian-Ordovi- 

 cian, Maryland. 



Cococonk limestone, Ordovician, Ontario. 



Codorus limestone, Ordovician, Pennsyl- 

 vania. 



Coggan beds, Silurian, Iowa. 



Colesburg terrane, Silurian, Iowa. 



College Hill limestone, Maysville, Cen- 

 tral Tennessee. 



Collingwood black shales, Trenton, On- 

 tario. 



Conococheague limestone, Upper Cam- 

 brian or Ozarkian, Pennsylvania, Mary- 

 land, etc. 



Con way schist, Ordovician (?), Massachu- 

 setts. 



Coos series, Silurian (?), New Hampshire. 



Coplay limestone, Canadian, Pennsyl- 

 vania. 



Copper Ridge chert, Ozarkian, Virginia 

 and Tennessee. 



Coral beda (Upper and Lower) Niagaran, 

 Wisconsin. 



Coralline limestone (=Cobleskill) Silu- 

 rian, New York. 



Cornish ville member of Perry ville, Tren- 

 ton, Kentucky. 



Cornwall limestone, Silurian, New York. 



Corryville beds, Maysville, Ohio Valley. 



Cotter limestone, Canadian, Arkansas. 



Covington group, = Cincinnatian. 



Crab Orchard formation, Clinton, Eastern 

 Kentucky. 



Croasdale quartzite, Silurian, New Jer- 

 sey. 



Crown Point limestone, Chazvan, New 

 York. 



Crystal City sandstone (=St. Peter) Big 

 Buffalo series, Missouri. 



Cumberland Head shale, Trenton, New 

 York. 



Cumberland sandstone, Richmond, Ken- 

 tucky. 



Curdsville limestone, Trenton, Ken- 

 tucky, Tennessee and Ontario. 



Cyiithiana formation, Trenton, Ohio 

 Valley. 



Cyrene member of Edgewood, Upper 

 Medinan, Illinois and Missouri. 



Dadina schist, Pre Silurian, Alaska. 



