292 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Double Mountain division of the Red Beds. 
Permian, Texas : Case. 443. 
Dresbach formation, Cambrian, Iowa : Cal- 
vin. 387. 
Dresbach sandstone, Cambrian, Iowa: 
Beyer and Williams, 234. 
Drum formation. I'ennsylvanian, Kansas: 
Schrader and Haworth, 2144. 
Drumlummon porphyry dikes. Montana : 
Barrel!, 149. 
Dry Creek shale, Devono-Silurian, Mon- 
tana : Emmons, 806. 
Dubuque formation. Ordovician. upper 
Mississippi Valley: Sardeson, 2122. 
Dudley shales. Carboniferous, Kansas : 
Beede and Rogers, 181 : Wooster, 2636. 
Duffin layer, Devonian, Kentucky : Foerste, 
883, 884. 
Dugout clays :md gravels. Tertiary. Texas: 
Fdden, 2400. 
Duluth gabbro, Algonkian. Minnesota: Ab- 
bott. 1. 
Dundee limestone, Devonian, Michigan : 
Cooper, 575 ; Lane, 1516. 
Dunkard formation. Carboniferous, Appa- 
lachian region : Stevenson, 2295. 
Dunkard formation, Permian, Maryland : 
Clark and Mathews, 488. 
Dunkard group. Carboniferous, Pennsyl- 
vania : Clapp, 475, 476. 
Dunkard group. Carboniferous (Permian). 
Pennsylvania : Clapp, 477. 
Dunkard series. Carboniferous, West Vir- 
ginia : Grimsley, 1044. 1046. 
Eagle formation, Cretaceous, Canada : 
Dowling, 735. 
Eagle limestone. Carboniferous. West Vir- 
ginia : Grimsley, 1044. 
Eagle Ford beds, Cretaceous, Texas : Ud- 
den, 2408. 
Eagle Ford formation, Cretaceous. Arkan- 
sas : Veatch, 2436. 
Eagle Ford formation. Cretaceous, Texas : 
Ries. 2058. 
Eagle Pass formation, Cretaceous, Texas : 
Udden, 2408. 
Eagle River group, Cambrian, Michigan : 
Lane and Seaman, 1518. 
Earlham limestone. Pennsylvanian, Iowa : 
Beyer and Williams. 234. 
Earlton limestone. Carboniferous, Kansas : 
Wooster, 2636. 
Eastford granite-gneiss. Connecticut : Greg- 
ory. 1034 ; Gregory and Robinson, 1038. 
East Greenwich group, early Carbonifer- 
ous or late pre-Carboniferous : Emerson 
and Perry, 790. 
Easton schist. pre-Tertiary, Washington : 
Smith and Calkins, 2240. 
Economy member, Ordovician, Ohio and 
Kentucky : Bassler, 156. 
Eddy formation. Carboniferous, New Mex- 
ico : Keyes, 1377. 
Eden, Ordovician, Kentucky : Miller. 1748. 
Eden formation, Ordovician, Ohio and Ken- 
tucky : Bassler, 156. 
Eden shale, Ordovician, Pennsylvania : 
Stose, 2318. 
Eden shales and sandstones, Ordovician, 
Virginia : Bassler, 158. 
Edgefield-Chesterfield zone, Algongian?, 
South Carolina : Sloan, 2218. 
Edisto marls, Miocene, South Carolina : 
Sloan, 2218. 
Edmonton formation, Cretaceous, Alberta : 
Cairnes, 381. 
Edmonton series. Cretaceous, Canada : Dow- 
ling. 735. 
Elbert formation, Devonian, Colorado : 
Cross et ah, 607. 
Elbrook limestone, Cambro-Ordovician, Penn- 
sylvania : Stose, 2318. 
Elgin sandstone, Pennsylvanian, Kansas : 
Schrader and Haworth, 2144 ; Wooster, 
2636. 
Elgin shaly limestones, Ordovician. Iowa : 
Calvin, 388. 
Elk Lick limestone, Carboniferous, West 
Virginia : Grimsley, 1044, 1046. 
Ellensburg formation. Tertiary, Washing- 
ton : Smith and Calkins, 2240. 
Ellis formation, Cretaceous, Montana : 
Rowe, 2090. 
Ellsworth schist, Cambrian or pre-Cam- 
brian, Maine : Smith ct al., 2241. 
Elmdale formation. Carboniferous, Kansas : 
Beede and Rogers, 181 ; Wooster, 2636. 
Elm Grove limestone. Carboniferous, West 
Virginia : Grimsley. 104(5. 
Elvins formation, Cambro-Ordovician, Mis- 
souri : Shepard, 2194. 
Ely greenstone, Archean, Minnesota : Ab- 
bott, 1. 
Ely limestone. Carboniferous, Nevada : 
Lawson, 1526. 
Embar formation. Carboniferous, Wyoming : 
Darton, 642, 647; Fisher, 873. 
Empire formation, Algonkian, Montana : 
Walcott, 2470. 
Empire shale, Algonkian, Montana : Barrell, 
149. 
Emporia limestone. Carboniferous, Kansas : 
Beede and Rogers, 181 ; Wooster, 2636. 
Enfield shale member, Devonian, New York: 
Williams, 2583. 
Englishtown, Cretaceous, New Jersey : 
Clark, 483. 
Englishtown sand, Cretaceous, New Jersey : 
Weller, 2520. 
Enoehkin formation, Jurassic, Alaska : 
Brooks, 313. 
Eo-Huronian, pre-Cambrian, Michigan : 
Lane and Seaman, 1518. 
Erie (Bronson) beds. Carboniferous, Kan- 
sas : Wooster, 2636. 
Erwin quartzite, Cambrian, North Caro- 
lina and Tennessee : Keith, 1354. 
Escondido beds of Eagle Pass formation, 
Cretaceous, Texas : Udden, 2408. 
Eskridge shales, Carboniferous, Kansas : 
Beede and Rogers, 181. 
