270  PRE-CAMBRIAN    ROCKS    OF    NORTH    AMERICA.  [bull.  86. 
NOTES. 
1  The  Primordial  Sandstone  of  the  Rocky  Mountains  in  the  Northwestern  Territories 
of  the  United  States,  F.  V.  Hayden.  Am.  Jour.  Sci.,  2d  ser.,  vol.  xxxiii,  1862,  pp.  68-79. 
See  also  Sketch  of  the  Geology  of  the  Country  about  the  Head  Waters  of  the  Missouri 
and  Yellowstone  Rivers.  Ibid.,  vol.  xxxi,  1861,  pp.  229-245.  Geological  Report  of 
Explorations  of  the  Yellowstone  and  Missouri  Rivers.    174  pp.,  with  a  geological  ma]). 
2  On  the  Geology  and  Natural  History  of  the  Upper  Missouri,  F.  V.  Hayden.  Trans. 
Am.  Phil.  Soc,  vol.  xn,  new  series,  1863,  pp.  1-218.  With  a  geological  map.  See  also 
Explanations  of  a  second  edition  of  a  geological  map  of  Nebraska  and  Kansas,  based 
npon  information  obtained  during  an  expedition  to  the  Black  Hills,  under  the  com- 
mand of  Lieut.  G.  K.Warren.  Proc.  Acad.  Nat.  Sci.,  Philadelphia,  vol.  x,  1859,  pp.  ■ 
139-158. 
3  Report  of  F.  V.  Hayden.  Preliminary  Report  of  the  U.  S.  Geological  Survey  of 
Wyoming,  and  portions  of  contiguous  territories  (being  a  fourth  annual  report  of 
progress),  pp.  1-188.  See  also  Notes  on  the  Geology  of  Wyoming  and  Colorado  Terri- 
tories.    Proc.  Am.  Phil.  Soc,  vol.  n,  1871,  pp.  25-56. 
4  Geological  Report  on  the  Black  Hills  of  Dakota,  N.  H.  Winchell.  Report  of  a 
Reconnaissance  of  the  Black  Hills  of  Dakota,  made  in  the  summer  of  1874,  by  William 
Ludlow,  pp.  21-66.     With  a  geological  map. 
5  Report  on  the  Geology  and  Resources  of  the  Black  Hills  of  Dakota,  Henry  Newton 
and  Walter  P.  Jenney.  U.  S.  Geog.  and  Geol.  Survey  of  the  Rocky  Mountain  Region, 
566  pp.  with  atlas. 
H  Tin  Ore  in  the  Black  Hills  of  Dakota,  William  P.  Blake.  Mineral  Resources  of 
the  United  States  for  1883  and  1884,  pp.  602-613. 
7  Geology  of  the  Black  Hills  of  Dakota,  W.  O.  Crosbys  Proc.  Bos.  Soc.  Nat.  Hist,, 
vol.  xxiii,  1884-1888,  pp.  488-517. 
8  Notes  on  the  Geology  of  the  Black  Hills,  Franklin  R.  Carpenter.  Preliminary 
Report  of  the  Dakota  School  of  Mines  upon  the  Geology,  Mineral  Resources,  and 
Mills  of  the  Black  Hills  of  Dakota,  pp.  11-52. 
9  The  pre-Cambrian  Rocks  of  the  Black  Hills,  C.  R.  Van  Hise.  Bull.  Geol.  Soc.  of 
America,  vol.  I,  pp.  203-241. 
10  Some  Remarks  on  the  Geology  of  the  State  of  Missouri,  Dr.  H.  King.  Proc.  Am. 
Assoc.  Adv.  Sci.,  1851,  5th  Meeting,  pp.  182-201. 
»  The  Metallic  Wealth  of  the  United  States,  J.  1).  Whitney.  Philadelphia,  1851, 
510  pp. 
12  First  and  Second  Annual  Reports  of  the  Geological  Survey  of  Missouri,  G.  C. 
Swallow.     Jefferson  City,  1855,  207,  239  pp. 
13  Geological  Report  of  the  country  along  the  line  of  the  Southwestern  Branch  of 
the  Pacific  Railroad,  State  of  Missouri,  G.  C.  Swallow.  St.  Louis,  1859,  pp.  93,  with 
map. 
14  Age  of  the  Porphyry  Hills  of  Southeast  Missouri,  Edwin  Harrison.  Trans.  St. 
Louis  Acad.  Sci.,  vol.  II,  p.  504. 
15  Geology  of  Pilot  Knob  and  its  vicinity,  Raphael  Pumpelly.  Preliminary  Report 
on  the  Iron  Ores  and  Coal  Fields  from  the  field  work  of  1872.     Part  1,  pp.  3-28. 
16  Iron  Ores  of  Missouri.  Adolp'h  Schmidt.     Ibid.,  Part  1,  pp.  45-214. 
17  Reports  on  the  Geological  Survey  of  the  State  of  Missouri,  1855-1871,  B.  F.  Shu- 
mard.     Jefferson  City,  1873,  pp.  189-323. 
18  Madison  County,  G.  C.  Broadhead  and  J.  G.  Norwood.  Report  of  the  Geologi- 
cal Survey  of  the  State  of  Missouri,  including  field  work  of  1873-'74,  pp.  342-379, 
with  an  atlas. 
19  A  Contribution  to  the  Archean  Geology  of  Missouri,  Erasmus  Haworth.  Am. 
Geol.,  vol.  I,  1888,  pp.  280-297,  363-382. 
20  The  Age  and  Origin  of  the  Crystalline  Rocks  of  Missouri,  Erasmus  Haworth. 
Geol.  Survey  of  Missouri,  Bull.  No.  5,  pp.  5-42. 
