THE   CORDILLERAS. 
891 
The  following  table  indicates,  in  graphic  form,  the  correlations 
above  suggested : 
Provisional  table  of  correlations. 
Yukon-Tanana            Klondike 
region.                   KionaiKe. 
Northern 
Alaska. 
Seward  Peninsula. 
Silurian  or  Ordovician. 
Fortymile. 
Hunker  group  and 
possibly     Klon- 
dike group. 
Skajit/ 
Nome  group,    includ- 
ing   Port    Clarence 
limestone. 
Cambrian  or  pre-Cam- 
brian. 
Birch  Creek. 
Indian  River  group. 
Totsen  group. 
Kuzitrin  group. 
Kigluaik  group. 
NOTES. 
1  Grundztige  der  physikalischen  Geographie  von  Guatemala,  by  Carl  Sapper. 
J.  Perthes  Geog.  Anst.,  Erganzungsheft,  No.  113,  1894,  pp.  59,  with  four  maps. 
2  Geology  of  Chiapas,  Tabasco,  and  the  Peninsula  of  Yucatan,  by  Carl  Sapper. 
Jour.  Geology,  vol.  4,  1896,  pp.  938-947. 
3  Sinopsis  de  geologia  mexicana,  by  Jose  C.  Aguilera.  Bol.  Inst.  geol.  de 
Mexico,  Nos.  4,  5,  and  0,  pt.  2,  1897,  pp.  189-250,  with  geological  maps. 
4  Memoir  of  a  tour  to  northern  Mexico,  connected  with  Colonel  Doniphan's 
expedition  in  184G  and  1847,  by  A.  Wislizenus.  Senate  Misc.  Docs.,  No.  26,  1st 
sess.  30th  Cong.,  1848,  141  pp.,  with  map. 
5  General  report  upon  the  geological  collections,  by  William  P.  Blake.  Report 
of  explorations  and  surveys  to  ascertain  the  most  practicable  and  economical 
route  for  a  railroad  from  the  Mississippi  River  to  the  Pacific  Ocean,  in  1853-54, 
vol.  3,  pp.  119,  with  a  geological  map. 
G  Geological  and  mineralogical  report  on  portions  of  Colorado  and  New  Mexico, 
by  Dr.  O.  Loew.  Rept.  Chief  of  Eng.  for  1875,  pt.  2,  Appendix  LL,  pp.  1017- 
1036. 
TReport  on  the  geology  of  portions  of  New  Mexico  and  Arizona,  examined  in 
is;::,  by  G.  K.  Gilbert.  Rept.  Gong,  and  Geol.  Surveys  West  100th  Mer.,  vol.  3, 
Geology,  1875,  pp.  503-566,  with  atlas  sheets. 
8  Notes* on  the  geology  of  northeastern  New  Mexico,  by  Orestes  St.  John.  Bull. 
U.  S.  Geol.  and  Geog.  Survey  Terr.,  vol.  2,  1876,  pp.  279-308. 
9  Geological  report,  by  J.  S.  Newberry.  Report  of  the  exploring  expedition 
from  Santa  Fe,  X.  Mex.,  to  the  junction  of  the  Grand  and  Green  rivers  of  the 
Great  Colorado  of  the  West,  in  1859,  under  the  command  of  Capt.  J.  N.  Macomb, 
1876,  pp.  152. 
10  Preliminary  report  of  a  special  geological  party  operating  in  Colorado  and 
New  Mexico,  from  Spanish  Peaks  to  the  south,  field  season  of  1878,  by  John  J. 
Stevenson.     Rept.  Chief  of  Eng.  for  1879,  pt.  3.  pp.  2249-22511. 
"Report  upon  geological  examinations  in  southern  Colorado  and  northern 
New  Mexico  during  the  years  1878  and  1879.  by  John  J.  Stevenson.  Rept.  U.  S. 
Geog.  Surveys.  \V.  100th  Mer.,  vol.  3,  Supplement,  Geology.  1881,  pp.  3-406, 
with  atlas  sheets. 
12 The  fundamental  complex  beyond  the  southern  end  of  the  Rocky  Mountains. 
by  C.  R.  Keyes.     Am.  Geologist,  vol.  36,  1905,  pp.  112-122. 
13A  reconnaissance  of  the  mineral  deposits  of  New  Mexico,  by  Waldemar 
Lindgren  and  L.  C.  Graton.     Bull.  U.  S.  Geol.  Survey  No.  285,   L906,  pp.  7!  m;. 
"Report  of  explorations  in  1873  of  the  .Colorado  of  the  West  and  its  tribu- 
taries, by  J.  W.  Powell,  1874,  pp.  36. 
