GREAT    NORTHERN    INTERIOR   OF   CANADA.  541 
Small  areas  of  Huronian  greenstones  and  schists  occur  in  two  locali- 
ties— one  on  Lac  du  Bonnet  and  the  other  at  the  mouth  of  Wannipe- 
gow  River. 
In  an  account  of  a  trip  from  Edmonton  through  Yellow  Dog  Puss, 
in  the  Rocky  Mountains,  to  Canoe  River,  a  tributary  of  Columbia 
River,  McEvoy a  describes  and  maps  Shuswap  rocks,  of  Archean b 
age,  occurring  on  Mica  Mountain,  near  (lie  western  end  of  the  route. 
The  series  includes  dark,  glittering  mica  schists;  easily  weathering, 
thinly  foliated,  garnetiferous  mica  schist,  with  a  high  percentage  of 
mica  and  garnet;  hard,  garnetiferous  mica  schist  in  massive  beds; 
bands  of  dark,  fine-grained  micaceous  rock  apparently  of  eruptive 
origin,  and  layers  of  fine-grained  gneiss,  which,  in  some  instances  at 
least,  is  certainly  intrusive.  The  whole  series,  while  differing  some- 
what from  the  Shuswap  series  of  the  southern  interior  of  British 
Columbia,  shows  the  main  characteristics  of  that  series  and  may  be 
classed  as  such.    The  age  of  this  series  as  given  by  DaAvson  is  Archean. 
Bell/'0  in  1901,  describes  and  maps  the  geology  of  Baffin  Land, 
or  northern  shore  of  Hudson  Strait,  as  the  result  of  his  work  of  1897. 
The  rocks  of  the  northern  side  of  Hudson  Strait  from  North  Bay  to 
Chorkback  Inlet  and  inland  to  Lake  Mingo  consist  of  well-stratified 
hornblende  and  mica  gneiss,  mostly  gray  in  color,  but  sometimes  red- 
dish, interstratified  with  great  bands  of  crystalline  limestones,  parallel 
to  one  another  and  conformable  to  the  strike  of  the  gneiss,  which  in  a 
general  way  may  be  said  to  be  parallel  to  the  coast  in  the  above  dis- 
tance. The  direction,  however,  varies  somewhat  in  different  sections 
of  the  coast.    All  are  of  Laurentian  age. 
The  distinguishing  feature  in  the  geology  of  the  southern  pari  of 
Baffin  Land  is  the  great  abundance,  thickness,  and  regularity  of  the 
Limestones  associated  with  the  gneisses.  At  least  ten  immense  bands 
were  recognized,  and  it  is  probable  that  two  others,  discovered  in 
North  Bay,  are  distinct  from  any  of  these.  There  would,  therefore, 
appear  to  be  twelve  principal  bands  as  far  as  known,  to  say  nothing 
of  numerous  minor  ones,  between  Icy  Cape  and  Chorkback  Inlet. 
Their  total  thicknesses  may  be  30,000  feet,  or  an  average  of  2,500  feet 
for  each  of  the  principal  bands.  These  rocks  are  correlated  with  the 
Grenville. 
Johnston,57  in  1902,  gives  a  brief  preliminary  account  of  the  Lau- 
rentian and  Huronian  rocks  of  the  eastern  part  of  the  Abitibi  region. 
Wilson,58  in  L902,  gives  a  brief  preliminary  account  of  the  Lauren 
tian  and  Huronian  rocks  of  the  western  part  of  the  Abitibi  region. 
Dowling,59  in   1902,  gives  a  brief  preliminary  account   of  an  ex 
amination  of  the  west  const   of   Hudson   liny.     Animikie  sediments 
and  traps  appear  at   Sutton   Mill   Lake     The  jasper  portions  of  the 
"Ann.  Rept.  Geol.  Survey  Canada  for  1898,  new  series,  vol.  11,  L901,  pp.  5  i»  M  d,  with 
sketch  map. 
6  Pre-Camhriau. 
