876 
PRE-CAMBRIAN    GEOLOGY   OF    NORTH   AMERICA. 
feet,  No  fossils  are  found,  and  their  position  as  lower  Paleozoic  is 
tentative.  In  the  alpine  region  of  Cariboo  are  found  gneisses,  gran- 
ites, and  quartzites,  which  resemble  the  characteristic  rocks  of  the 
Archean.  Associated  with  these  are  lower  granitic  rocks.  The  entire 
crystalline  series  of  the  gold  region  of  Cariboo  is  lithologically  iden- 
tical, as  near  as  can  be  described  in  general  terms,  with  the  rocks  of 
the  pre-Cambrian  and  Cambrian  gold  regions  of  eastern  Canada.  The 
gfteissic  and  schistose  type  of  rocks  of  the  Mount  Stevenson  group 
especially  (supposed  to  represent  the  lowest  horizon,  on  account  of 
their  association  with  granite  in  a  central  and  massive  mountain 
group)  finds  lithological  representatives  in  the  pre-Cambrian  rocks 
of  the  eastern  provinces  of  the  Dominion  and  in  the  Appalachian 
axis. 
Dawson  (G.  M.),186  in  1891,  describes  a  section  in  the  Selkirk 
Range  and  compares  it  with  a  section  of  the  interior  plateau  region 
at  Kootenai  and  Adams  lakes  and  on  the  west  side  of  the  Rocky 
Mountains.     The  sections  are  given  and  correlated  as  follows: 
Provisional  comparative  table  of  formations  met  with  (1)  in  the  eastern  border 
of  the  interior  plateau  of  liriti.sli  Columbia,  (2)  in  the  Selkirk  Range,  and 
(3)  on  tin'  western  -side  of  (tie  adjacent  portion  of  tlie  Rocky  Mountain  ran</es. 
