898  PRE-CAMBRIAN   GEOLOGY  OF   NORTH  AMERICA. 
141  Relation  of  the  coal  of  Montana  to  the  older  rocks,  by  W.  M.  Davis, 
Tenth  Census,  vol.  15,  1886,  pp.  697-712. 
143  The  Paleozoic  section  in  the  vicinity  of  Three  Forks,  Mont.,  by  A.  C. 
Peale.  Bull.  U.  S.  Geol.  Survey  No.  110,  1893,  pp.  56.  Description  of  the 
Three  Forks  quadrangle,  by  A.  C.  Peale.  Geologic  Atlas  U.  S.,  folio  24,  U.  S. 
Geol.  Survey,  1896. 
143  Description  of  the  Livingston  quadrangle,  by  J.  P.  Iddings,  W.  H.  Weed, 
and  Arnold  Hague.    Geologic  Atlas  U.  S.,  folio  1,  U.  S.  Geol.  Survey,  1894. 
144  Geology  of  the  Castle  Mountain  mining  district,  Montana,  by  W.  H.  Weed 
and  L.  V.  Pirsson.  Bull.  U.  S.  Geol.  Survey  No  139,  1896,  pp.  165,  with  geo- 
logical map. 
145  The  geology  of  the  Little  Rocky  Mountains,  by  W.  H.  Weed  and  L.  V. 
Pirsson.     Jour.  Geology,  vol.  4,  1896,  pp.  399-428. 
146  The  geology  of  Helena,  Mont.,  and  vicinity,  by  L.  S.  Griswold.  Jour. 
Assoc.  Eng.  Soc,  vol.  20,  1898,  pp.  1-18. 
147  Description  of  Port  Benton  and  Little  Belt  Mountains  quadrangles,  by 
Walter  H.  Weed.     Geologic  Atlas  U.  S.,  folios  55  and  56,  U.  S.  Geol.  Survey, 
1899.  See  also  Geology  of  the  Little  Belt  Mountains,  Montana,  by  Walter  H. 
Weed.     Twentieth  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  3,  1900,  pp.  278-284. 
148  Geology  and  ore  deposits  of  the  Elkhorn  mining  district,  Jefferson  County, 
Mont.,  by  W.  H.  Weed.  Twenty-second  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  2, 
1901,  pp.  399-549. 
149  Stratigraphy  and  structure,  Lewis  and  Livingston  ranges,  Montana,  by 
Bailey  Willis.     Bull.  Geol.  Soc.  America,  vol.  13,  1902,  pp.  305-352. 
150  Manuscript  prepared  for  this  bulletin  by  Walter  Harvey  Weed. 
151Algonkian  formations  of  northwestern  Montana,   by  Charles  D.  Walcott. 
Bull.  Geol.  Soc.  America,  vol.  17,  1906,  pp.  1-28. 
152  Geology  of  the  Marysville  mining  district,  Montana,  by  Joseph  Barrell. 
Prof.  Paper  U.  S.  Geol.  Survey  No.  57,  1907,  pp.  178. 
152a  personai  communication,  1908. 
153  Report  upon  the  geology  of  the  central  portion  of  Washington  Territory, 
by  George  Gibbs.  Reports  of  explorations  and  surveys  from  the  Mississippi 
River  to  the  Pacific  Ocean  in  1853-54,  vol.  1,  1855,  pp.  473^86. 
154  A  preliminary  paper  on  the  geology  of  the  Cascade  Mountains  in  northern 
Washington,  by  I.  C.  Russell.     Twentieth  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  2, 
1900,  pp.  102. 
155  An  outline  of  the  geology  of  Washington,  by  Henry  Landes.  Ann.  Rept. 
Washington  Geol.  Survey  for  1901,  vol.  1,  1902,  pp.  11-35. 
156  Geology  and  physiography  of  central  Washington,  by  George  Otis  Smith. 
Prof.  Paper  U.  S.  Geol.  Survey  No.  19,  1903.  See  also  Description  of  the 
Mount  Stuart  quadrangle.    Geologic  Atlas  U.  S.,  folio  106,  1904. 
157  A  geological  reconnaissance  across  the  Cascade  Range  near  the  forty-ninth 
parallel,  by  George  Otis  Smith  and  F.  C.  Calkins.  Bull.  U.  S.  Geol.  Survey  No. 
235,  1904,  pp.  103. 
158  The  gold  belt  of  the  Blue  Mountains  of  Oregon,  by  Waldemar  Lindgren. 
Twenty-second  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  2,  1901,  pp.  551-776. 
159  United  States  exploring  expedition  during  the  years  1838,  1839,  1840,  1841, 
1842.  under  the  command  of  Charles  Wilkes,  vol.  10,  Geology,  by  James  D.  Dana. 
Philadelphia,  1849,  pp.  xii,  9-756,  5  maps,  and  folio  atlas  of  21  plates. 
160  Report  upon  the  geology  of  California,  by  P.  T.  Tyson.  Senate  Ex.  Docs., 
1st  sess.  31st  Cong.,  vol  10,  No.  47,  pp.  3-74,  with  a  map. 
