LIST OF AMERICAN FORMATIONS. 1515 



Garden City limestone, Canadian, Utah. Hardwick gneiss, Ordovician(?), Massa- 

 Garrard sandstone, Eden, Kentucky. chusetts. 



Gasconade limestone, Ozarkian, Missouri. Hartwick terrane, Silurian, Iowa. 



Gasport limestone member, Upper Nia- Hawley schist, Ordovician(?), Massachu- 



garan, New York. setts. 



Gilbert member, Maysville, Kentucky. Heiskell shale, Upper Chazyan, Virginia 

 Girardeati limestone, Upper Medinan, and Tennessee. 



Illinois and Missouri. Henryhouse shale, Niagaran, Oklahoma. 



Glade limestone (=Lebanon), Stones Hermansville limestone, Cambrian-Ordo- 



River, Tennessee. vician, Michigan. 



Glen Falls limestone, Trenton, New York. Hermitage limestone, Trenton, Tennessee 

 Glencoe marble (Galena), Mohawkian, and Kentucky. 



Illinois. Highbridge limestone, Stones River- 

 Glens Falls black marble, Silurian, Ar- Black River, Kentucky. 



kansas. High Falls shale, Lower Cayugan, New 

 Glenkirk limestone, Niagaran, west Ten- York and New Jersey. 



nessee. Hillsboro sandstone, U^pper Cayugan,Ohio. 



Glenwood shales, base of Platteville, Hinton division of San Saba series, Silu- 



lowa and Minnesota. rian(?), Texas. 



Goodsir formation, Canadian, British Co- Hitz layer of Saluda, Richmond, Indiana. 



lumbia. Holland sandstone (=Sylvania), Monroan, 

 Goshen schist, Ordovician (?), Maseachu- Ohio. 



setts. Holston marble, Blount group, Tennessee 

 Gower formation, Cayugan, Illinois and and Virginia. 



Iowa. Hoosac schists, Ordovician, Massachu- 

 Grand Rapids sandstone (=Sylvania), setts. 



Monroan, Ohio, etc. Hoover division, Silurian(?), Texas. 



Granville serpentines, Ordovician (?), Hopkinton dolomite, Niagaran, Iowa and 



Massachusetts. Minnesota. 



Gratz shale (of Cynthiana), Trenton, Ken- Hoyt limestone, Upper Cambrian or 



tucky. Ozarkian, New York. 



Gray sandstone (of Oswego), Silurian, Hudson River beds or group, Ordovician, 



New York. New York, etc. 



Greendale bed (of Cynthiana), Trenton, Hudson shale and schist, Ordovician, New 



Kentucky. York, etc. 



Greenfield dolomite, Upper Cayugan, Hull limestone, Trenton, Central Ontario. 



Ohio and Michigan. Huntington limestone, Niagaran, north- 

 Green Pond conglomerate, Upper Medi- era Indiana. 



nan, New Jersey and New York. Hunton formation, Silurian and Lower 

 Greylock schist, Ordovician (?), Massa- Devonian, Arkansas. 



chusetts. Hurrah slate, Post Ordovician, Alaska. 



Grimsby sandstone, Upper Medinan, On- Hydraulic limestone, Silurian, New York, 



tario. etc. 



Grizzly formation, Silurian, California. Indian Fields formation, Clinton, eastern 

 Guelph dolomite, Niagaran, Ontario, New Kentucky. 



York, Michigan, etc. Indian Ladder beds, Eden, New York. 



Gun River formation, Anticostian, Anti- Inwood limestone, Ordovician(?), New 



costi Island, Quebec. York. 



Gunter sandstone (member of Gasconade) Irondequoit limestone, Upper Clinton, 



Ozarkian, Missouri. New York and Ontario. 



Hancock limestone, Cayugan, east Ten- Irasburg conglomerate, Ordovician, Ver- 



nessee. mont. 



Harding sandstone, Black River (just Iron Ridge ore bed, Upper Medinan, Wis- 



below Kimmswick limestone), Colorado. consin . 

 84243 Bull. 92 vol 210 51 



