314 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Yarmouth, Quaternary, Iowa : Calvin, 387. 
Yegua clays, Eocene, Texas : Penhallow* 
1899. 
Yegua clays, Tertiary, Texas : Fenneman. 
859; Ries, 2058. 
Yellow Creek sandstone member. Carbonif- 
erous, Kentucky : Ashley and Glenn, 77. 
Yellville formation, Ordovician, Indian Ter- 
ritory : Taff, 2332. 
Yogo limestone, Devono-Silurian, Montana : 
Emmons, 800. 
Yonkers gneiss, pre-Cambrian, New York : 
Berkey, 207. 
Yorktown formation. Tertiary, Virginia : 
Clark and Miller, 489. 
Yukon silts, Quaternary, Alaska : Brooks. 
313. 
MINERALS DESCRIBED. 
Abriachanite, 1779. 
Actinolite, 1893. 
Agalmatolite, 1437. 
Albite, 2565. 
Allanite, 2478, 2493. 
Allophane, 2081. 
Amber, 1437. 
Amblygonite, 87. 
Amphibole, 28, 1705, 1893, 2565. 
Andalusite, 1437. 
Anglesite, 99, 346, 1017, 2081. 
Anhydrite, 1437. 
Anorthite, 857. 
Apatite, 1437, 2493, 2565. 
Apophyllite, 1437. 
Aragonite, 346. 
Aragotite, 1072. 
Arfvedsonite, 1779. 
Arsenopyrite, 1705. 
Astrophyllite, 251. 
Augite, 2478. 
Aurichalcite, 2081. 
Axinite, 1437. 
Azurite, 1437, 2081. 
Bakerite, 958. 
Barite, 99, 753, 1017, 2081, 2134. 
pisolitic, 2656. 
Barkevikite, 1779. 
Benitoite, 1620. 
Beryl, 753, 888, 1437. 
Biotite, 2478, 2565. 
Bornite, 539, 1705. 
Bronzite, 2478. 
Brookite, 1437, 1863. 
Calamine, 99, 346, 1017. 2081, 2484. 
Calcite, 93, 99, 251, 346, 753, 1017, 1119, 
1429, 1437, 2081, 2111, 2565-2567. 
phosphorescent, 1116. 
Caledonite, 2081. 
Calomel, 1161. 
Carinthine, 2242. 
Cassiterite, 1025, 1115, 1437. 
Catapleite, 251. 
Celestite, 1427. 
Cerusite, 99, 346, 1017, 2081, 2484. 
Chalcanthite, 2081. 
Chalcedony, 1437. 
Chalcopyrite, 99, 346, 539, 1705, 2081. 
Chalmersite, 1864. 
Chlorite, 2478. 
Chromite, 2478. 
Chrysocolla, 1437, 1705. 
Chrysolite, 2478. 
Chrysoprase, 1437. 
Cinnabar, 1705, 2111. 
Cobaltite, 703. 
Columbite, 753, 2493. 
Columbite-tantalite, 2478. 
Copiapite, 2081. 
Copper, 1912. 
Cordierite, 2478. 
Cordylite, 251. 
Corundum, 1437. 
Covellite, 2081. 
Crocidolite, 1779. 
Crossite, 1779. 
Cuprite, 2081. 
Datolite, 1426, 1437. 
Diamond, 1437, 1440, 1444, 144.~. 
Diopside, 1437, 1952, 2242. 2478. 
Dolomite, 99, 346, 1017, 2081. 
Dufrenite, 2493. 
Eglestonite, 1161. 
Elpidite, 251. 
Endlichite, 274. 
Enstatite, 28, 1437, 2478. 
Epididymite, 251. 
Epidote, 1437, 2242, 2478, 2565. 
Euxenite, 1524. 
Evansite, 2136. 
Feldspar, 1437. 
Fluorite, 93, 1437. 
Fosterite, 28. 
Galena, 99, 346, 539, 1705, 2081. 
Galenite, 1017, 2484. 
Garnet, 1437, 2242, 2478. 
Gastaldite, 1779. 
Gersdorfflte, 539. 
Glaucophane,1779, 2242. 
Goethite, 1437, 2478. 
Goslarite, 2081. 
Greenockite, 346. 
Gypsum, 1437, 2081, 2111. 
Halloysite, 2664. 
Helvite, 2493. 
Hematite, 346, 1705, 2081, 247S, 256 
Hornblende, 1705, 1893, 2367, 247s. 
Howlite, 958. 
Hudsonite, 1893. 
Huebnerite, 1115. 
Hydrozincite, 99, 346, 1017, 2081. 
Hypersthene, 2478. 
Ilmenite, 2478. 
lolite, 2478. 
Irvingite, 2511. 
Jade, 1437. 
Jamesonite, 1115. 
Jasper, 1437. 
