﻿PfeALE.] 
  UNA 
  WEEP 
  CANON 
  WEST 
  CREEK. 
  57 
  

  

  111 
  the 
  angle 
  between 
  the 
  Dolores 
  and 
  the 
  creek, 
  from 
  the 
  Unaweep 
  

   CaiioD, 
  there 
  is 
  a 
  butte-like 
  mass, 
  with 
  a 
  capping 
  of 
  shales. 
  This 
  batte 
  

   has 
  bat 
  -little 
  width, 
  and 
  the 
  connection 
  between 
  it 
  and 
  the 
  mass 
  to 
  the 
  

   north 
  appears 
  to 
  be 
  partially 
  broken. 
  

  

  North 
  of 
  West 
  Creek 
  we 
  can 
  say 
  but 
  little 
  about 
  the 
  valley 
  of 
  the 
  

   Dolores, 
  save 
  that 
  the 
  river 
  is 
  for 
  the 
  most 
  part 
  in 
  canon, 
  with 
  Triassic 
  

   and 
  Upper 
  Carboniferous 
  rocks 
  showing. 
  The 
  depth 
  of 
  the 
  canon 
  is 
  

   from 
  2,000 
  to 
  3,000 
  feet, 
  judging 
  from 
  the 
  data 
  we 
  have 
  above 
  this 
  point 
  

  

  North 
  and 
  northeast 
  of 
  the 
  mouth 
  of 
  the 
  Dolores 
  there 
  appears 
  to 
  be 
  

   a 
  dip 
  in 
  the 
  strata 
  toward 
  the 
  north 
  and 
  northwest, 
  which 
  causes 
  the 
  

   red 
  beds 
  to 
  pass 
  beneath 
  the 
  Jurassic 
  formation, 
  a 
  portion 
  of 
  which 
  

   shows 
  between 
  the 
  Dolores 
  and 
  Grand 
  Kiver. 
  The 
  lower 
  plateau, 
  ex- 
  

   tending 
  from 
  the 
  Dolores 
  Eiver 
  tothe 
  crest 
  on 
  which 
  stations 
  43, 
  47, 
  and 
  

   48 
  are 
  located, 
  is 
  about 
  eight 
  miles 
  in 
  width. 
  The 
  floor 
  is 
  mostly 
  .red 
  

   sandstone, 
  with 
  a 
  few 
  isolated 
  cappings 
  of 
  Jurassic 
  shales. 
  There 
  is 
  a 
  

   narrow 
  strip 
  of 
  granitic 
  rock 
  showing 
  below 
  station 
  47, 
  on 
  the 
  opposite 
  

   side 
  of 
  which 
  there 
  is 
  a 
  bend 
  in 
  the 
  beds, 
  the 
  dip 
  being 
  toward 
  the 
  

   southwest. 
  The 
  appears 
  to 
  be 
  a 
  slight 
  slope 
  in 
  that 
  direction 
  until 
  we 
  

   cross 
  the 
  Dolores. 
  The 
  true 
  dip 
  is 
  probably 
  a 
  little 
  south 
  of 
  west, 
  grad- 
  

   ually 
  turning 
  to 
  the 
  west 
  and 
  north 
  of 
  west 
  as 
  we 
  go 
  northwest 
  of 
  sta- 
  

   tion 
  47. 
  

  

  We 
  will 
  now 
  return 
  to 
  the 
  north 
  side 
  of 
  the 
  Unaweep 
  Canon. 
  As 
  we 
  

   have 
  already 
  seen, 
  the 
  length 
  of 
  the 
  creek 
  on 
  the 
  western 
  side 
  is 
  about 
  

   twenty-three 
  miles. 
  For 
  about 
  fifteen 
  miles 
  its 
  course 
  is 
  nearly 
  due 
  west. 
  

   We 
  have 
  already 
  considered 
  its 
  southern 
  branches. 
  On 
  the 
  north, 
  in 
  

   this 
  part 
  of 
  its 
  course, 
  it 
  is 
  joined 
  by 
  six 
  creeks, 
  rising 
  in 
  the 
  plateau 
  

   in 
  a 
  park-like 
  country. 
  The 
  first 
  three 
  have 
  a 
  southerly 
  course, 
  cutting 
  

   through 
  the 
  almost 
  horizontal 
  sedimentary 
  beds, 
  and 
  touching 
  the 
  under- 
  

   lying 
  archsean 
  before 
  reaching 
  the 
  edge 
  of 
  the 
  caiion, 
  over 
  which 
  they 
  

   flow 
  precipitously 
  to 
  join 
  the 
  main 
  stream. 
  The 
  fourth 
  branch 
  rises 
  

   about 
  station 
  41, 
  in 
  the 
  same 
  park-like 
  country, 
  and 
  flows 
  to 
  the 
  south- 
  

   west. 
  It 
  does 
  not 
  break 
  over 
  the 
  edge 
  of 
  the 
  caiion 
  so 
  abruptly 
  as 
  the 
  

   two 
  upper 
  branches. 
  The 
  fifth 
  branch 
  is 
  small. 
  It 
  rises 
  on 
  the 
  south 
  

   sides 
  of 
  stations 
  42 
  and 
  43. 
  Its 
  course, 
  which 
  is 
  somewhat 
  irregular, 
  is 
  

   probably 
  almost 
  entirely 
  in 
  the 
  gneissic 
  rocks, 
  although 
  the 
  red 
  beds 
  

   cap 
  them 
  on 
  either 
  side. 
  Stations 
  42 
  and 
  43 
  are, 
  I 
  think, 
  on 
  rocks 
  of 
  

   Jurassic 
  age 
  (or 
  Lower 
  Dakota), 
  although 
  no 
  fossils 
  could 
  be 
  obtained 
  

   for 
  proof. 
  

  

  The 
  next 
  creek 
  is 
  by 
  far 
  the 
  largest 
  branch 
  on 
  the 
  north. 
  It 
  has 
  its 
  

   origin 
  in 
  a 
  beautiful 
  park-like 
  country 
  north 
  of 
  stations 
  42 
  and 
  43, 
  be- 
  

   tween 
  them 
  and 
  station 
  45. 
  It 
  does 
  not 
  plunge 
  abruptly 
  over 
  the 
  edge 
  

   of 
  the 
  precipice, 
  but 
  cuts 
  its 
  way 
  gradually 
  through 
  the 
  rocks 
  to 
  the 
  

   level 
  of 
  the 
  main 
  stream, 
  which 
  it 
  joins 
  where 
  the 
  latter 
  turns 
  to 
  the 
  

   south. 
  On 
  the 
  west 
  side 
  of 
  the 
  creek 
  is 
  a 
  ridge, 
  which, 
  commencing 
  at 
  

   station 
  45, 
  sweeps 
  semicircularly 
  around 
  the 
  western 
  sources 
  of 
  the 
  

   creek 
  and 
  follows 
  approximately 
  its 
  course, 
  sloping 
  from 
  a 
  point 
  west 
  of 
  

   station 
  42 
  to 
  the 
  edge 
  of 
  the 
  Unaweep 
  Caiion. 
  After 
  this 
  stream 
  comes 
  

   in, 
  the 
  creek 
  in 
  the 
  canon 
  ( 
  West 
  Creek) 
  flows 
  to 
  the 
  southward 
  for 
  about 
  

   four 
  miles, 
  at 
  right 
  angles 
  to 
  its 
  former 
  course. 
  It 
  then 
  receives 
  the 
  

   branch 
  from 
  station 
  23, 
  and 
  again 
  turns 
  abruptly, 
  this 
  time 
  to 
  the 
  west, 
  

   flowing 
  in 
  that 
  direction 
  for 
  nearly 
  a 
  mile, 
  when 
  it 
  flows 
  southwest 
  to 
  

   the 
  Dolores. 
  

  

  Station 
  47 
  is 
  located 
  on 
  the 
  upper 
  part 
  of 
  the 
  red 
  beds, 
  on 
  the 
  edge 
  of 
  

   the 
  plateau. 
  Here, 
  again, 
  is 
  a 
  break 
  in 
  the 
  continuity 
  of 
  the 
  strata, 
  a 
  

   line 
  of 
  granite 
  appearing 
  on 
  the 
  plateau 
  below, 
  against 
  which 
  the 
  strata, 
  

   probably 
  a 
  portion 
  of 
  the 
  Lower 
  Triassic, 
  are 
  tipped 
  up. 
  Beyond, 
  

  

  