342  PRE-OAMBRIAN    ROCKS    OF    NORTH    AMERICA.  [bull.  86.  I 
In  British  Columbia  tlie  lower  7,000  feet  of  the  Bow  river  series  of  rocks  I 
may  be  pre-Olenellus,  and  not  improbably  belong  to  the  Algonkian  un-  i 
der  our  usage  of  the  term,  although  placed  by  Dawson  under  his  usage  -3 
as  a  part  of  the  Cambrian.  If  a  part  of  this  Bow  river  series  is  Argon-  j 
kian,  it  would  carry  with  it  also,  in  all  probability,  the  Msconlith  series, } 
with  possibly  a  portion  of  the  Selkirk  series,  and  doubtless  also  a  por- 1 
tion  at  least  of  the  section  at  Kootanie  and  Adams  lakes  j  hence  it  is  I 
not  improbable  that  in  British  Columbia  is  a  great  area  in  which  Al- 1 
gonkian  rocks  occur. 
NOTES. 
Exploration  and  Survey  of  the  Valley  of  the  Great  Salt  Lake  of  Utah,  including  I 
a  Reconnaissance  of  a  New  Route  through  the  Rocky  Mountains,  Capt.  Howard  Stans- 1 
bury.  Washington,  1853,  495  pp.,  atlas  of  2  maps.  Abstract  taken  from  edition  of  i! 
1855,  published  in  Philadelphia. 
2  On  the  Geology  and  Natural  History  of  the  Upper  Missouri,  F.  V.  Hayden.  Trans.  I 
Am.  Phil.  Soc,  vol.  xu,  new  series,  1863,  pp.  1-218,  with  a  geological  map. 
3  Geological  Report,  F.  V.  Hayden.  Third  Annual  Report  of  the  U.  S.  Geological 
Survey  of  the  Territories,  embracing  Colorado  and  New  Mexico,  pp.  109-199. 
4  Report  of  F.  V.  Hayden.  Preliminary  Report  of  the  U.S.  Geological  Survey  of 
Wyoming  and  portions  of  contiguous  territories  (being  Fourth  Ann.  Rept.  of  Prog.), 
pp.  1-188. 
6 Report  on  the  Geology  of  the  Country  between  Fort  Leavenworth,  Kansas,  and; 
the  Sierra  Nevada,  near  Carson  Valley,  Henry  Engelmann.  Report  of  Explorations  * 
across  the  Great  Basin  of  the  Territory  of  Utah  for  a  direct  Wagon  Route  from  I 
Camp  Floyd  to  Genoa,  in  Carson  Valley,  in  1859,  by  Captain  J.  H.  Simpson,  pp.  I 
247-336. 
6 Descriptive  Geology,  Arnold  Hague  and  S.  F.  Emmons.  U.  S.  Geological  Explora-' 
tion  of  the  Fortieth  Parallel,  Clarence  King,  Geologist  in  Charge,  vol.  n,  890  pp.,  26 
plates.     See  also  vol.  i. 
7  Systematic  Geology,  Clarence  King.  U.  S.  Geological  Exploration  of  the  Fortieth 
Parallel,  vol.  I,  803  pp.,  with  an  atlas. 
8Report  on  the  Geology  of  the  Sweetwater  District,  F.  M.  Endlich.  11th  Ann. 
Rept.  U.  S.  Geol.  and  Geog.  Survey  of  the  Territories,  embracing  Idaho  and  Wyoming, 
being  a  Report  of  Progress  of  the  Exploration  for  the  year  1877,  pp.  1-158. 
9  Based  on  unpublished  field-notes  made  by  C.  R.  Van  Hise,  in  the  summer  of  1889. 
10 Sketch  of  the  Geology  of  the  Country  about  the  Head  Waters  of  the  Missouri 
and  Yellowstone  rivers,  Dr.  F.  V.  Hayden.  Am.  Jour.  Sci.,  2d  ser.,  vol.  xxxi,  186L 
pp.  229-245. 
11  Second  Annual  Report  of  the  U.  S.  Geological  Survey  of  the  Territories,  embrac- 
ing Wyoming,  F.  V.  Hayden,  pp.  65-102. 
12  Report  on  the  Geology  and  Natural  History  of  the  Big  Horn  Mountains,  W.  L. 
Carpenter.    Reports  of  Inspection  made  in  the  summer  of  1877,  by  Genls.  P.  H.  Sher-  • 
idan  and  W.  T.  Sherman,  of  country  north  of  the  Union  Pacific  Railroad,  pp.  11-19. 
"Remarks  upon  the  Geology  and  Physical  Features  of  the  Country  West  of  the 
Rocky  Mountains,  with  miscellaneous  facts.  John  Ball,  Am.  Jour.  Sci.,  1st  ser.,  vol. 
xxviii,  pp.  1-16. 
"Geological  Report,  Theodore  B.  Comstock.  Report  upon  the  reconnaissance  of 
Northwestern  Wyoming,  including  Yellowstone  National  Park,  made  in  the  summer 
of  1873  by  William  A.  Jones,  pp.  102-116,  with  a  geological  map  of  western  Wyoming,  j 
16  Report  on  the  Geology  of  the  Green  River  District,  A.  C.  Peale.  11th  Ann.  Rept. 
U.  S.  Geol.  and  Geog.  Survey  of  the  Territories,  pp.  509-646. 
16  Report  on  the  Geology  of  the  Wind  River  District,  Orestes  St.  John.    12th  Ann. 
