214    •  PRE-CAMBRIAN   ROCKS    OF   NORTH   AMERICA.  [bull.  86. 
rock.  In  tliis  region  were  also  found  masses  of  native  copper  and  preh- 
nite.  The  shores  of  Bathurst  inlet  are  partly  of  granite  and  gneiss  and 
partly  of  later  rocks.  On  the  road  from  Bathurst  inlet  to  Point  lake 
and  Fort  Enterprise,  beyond  Hood's  river,  the  rocks  are  entirely  gneissic 
or  granitic. 
Parry,14  in  1824,  found  granitic  and  gneissic  rocks  to  occupy  the 
whole  southern  part  of  the  east  shore  of  Melville  peninsula  and  to 
continue  northward  behind  a  tract  of  limestone  country,  forming  a 
range  of  mountains  in  the  center  of  the  peninsula  to  Hecla-and-Fury 
strait.  They  also  form  the  south  shore  of  this  strait,  most  of  the  islands 
adjacent  to  it,  and  apparently  the  whole  eastern  shore  of  the  adjacent 
south  part  of  Cockburn  "island." 
Koning,15  in  1824,  describes  the  most  characteristic  rock  collected  by 
Capt.  Parry  on  the  west  coast  of  Baffin  bay  as  gneiss  and  micaceous 
quartz  rock,  with  some  ambiguous  granitic  compound  in  which  horn- 
blende seems  to  enter  as  a  subordinate  ingredient. 
Lyon,16  in  1825,  describes  cape  Fullerton  on  the  main  shore  west  of 
Southampton  island  to  be  composed  of  rugged  red  and  gray  granitic 
rocks  with  the  strata  running  in  a  northwest  direction. 
Jameson,17  in  1826,  states  that  the  material  collected  by  Oapt.  Parry 
shows  that  the  west  coast  of  Davis  strait  and  Baffin  bay,  south  of 
Lancaster  sound,  consists  of  primitive  rocks,  among  which  are  gneiss, 
mica-slate,  horn  blende- si  ate,  granite  limestone,  hornblende-rock,  and 
greenstone.  All  these  rocks  are  more  or  less  distinctly  stratified  and 
numberless  transitions  from  one  into  the  other  were  observed. 
Richardson,18  in  1828,  describes  the  rocks  of  the  Coppermine  river 
series  as  extending  westward  to  the  Height  of  Land  and  consisting 
chiefly  of  sandstone  and  conglomerates  with  granite  and  porphyry. 
The  southeast  extremity  of  McTavish  bay  consists  of  red  granites  and 
gneisses.  At  the  mouth  of  Dease  river  and  the  northeast  extremity  of 
the  lake  the  prevailing  formation  is  granitic  and  gneissic.  On  mount 
Fitton,  along  the  Arctic  coast  west  of  the  Mackenzie  river,  the  moun- 
tain range  consists  of  gray  wacke  slates  which  are  considered  transition 
rocks. 
Leslie,  Jameson,  and  Murray  (Hugh),19  in  1830,  mention  in  the 
region  of  Southampton  island,  Melville  peninsula,  and  Hecla-and-Fury 
strait,  as  prominent  varieties  of  rock,  granite,  gneiss,  mica-slate,  clay- 
slate,  chlorite- slate,  primitive  trap,  serpentine,  limestone,  and  porphyry. 
The  Primitive  range  bordering  the  east  coast  of  Baffin  land  is  a  contin- 
uation of  the  Labrador  coast ;  and  on  the  west  coast  of  Davis  strait  and 
Baffin  bay,  south  of  Lancaster  strait,  primitive  rocks  preponderate, 
including  gneiss,  mica-slate,  and  granite. 
Boss,20  in  1835,  finds  granitoid  and  gneissic  rocks  to  occupy  exclu- 
sively the  coast  line  and  adjacent  islands  of  the  Boothian  and  Melville 
peninsula  south  of  70°  35'. 
Fitton,21  in  1836,  describes  the  north  side  of  Great  Slave  lake  from 
