﻿398 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  Lower 
  Miocene 
  (Arikareean) 
  Localities 
  

  

  24LC18. 
  SKSWK 
  sec. 
  11, 
  T. 
  10 
  N., 
  R. 
  1 
  W., 
  of 
  the 
  Montana 
  prime 
  

   meridian, 
  about 
  1 
  mile 
  east 
  of 
  Canyon 
  Ferry, 
  Lewis 
  and 
  Clark 
  County, 
  

   Mont. 
  About 
  200 
  feet 
  of 
  fine-grained, 
  dense, 
  buff 
  sandstone, 
  which 
  

   weathers 
  into 
  nearly 
  vertical 
  cliffs 
  are 
  exposed 
  in 
  this 
  area 
  (fig. 
  42). 
  

   In 
  texture 
  and 
  color 
  these 
  deposits 
  very 
  closely 
  resemble 
  the 
  Harrison 
  

   deposits 
  of 
  western 
  Nebraska 
  and 
  eastern 
  Wyoming. 
  This 
  locality 
  is 
  

   the 
  one 
  from 
  which 
  Douglass 
  and 
  others 
  have 
  obtained 
  Miocene 
  fossils 
  

   at 
  Canyon 
  Ferry 
  and 
  it 
  is 
  still 
  the 
  most 
  productive 
  Miocene 
  locality 
  

   in 
  the 
  area; 
  but, 
  even 
  so, 
  fossils 
  are 
  not 
  common. 
  

  

  24LC19. 
  NEKSWK 
  sec. 
  2, 
  T. 
  10 
  N., 
  R. 
  1 
  W., 
  of 
  the 
  Montana 
  prime 
  

   meridian, 
  about 
  1^ 
  miles 
  northeast 
  of 
  Canyon 
  Ferry, 
  Lewis 
  and 
  Clark 
  

   County, 
  Mont. 
  This 
  locality 
  is 
  a 
  small 
  area 
  of 
  cliffs 
  in 
  the 
  buff 
  sand- 
  

   stone 
  on 
  the 
  northeast 
  side 
  of 
  the 
  highway 
  just 
  southeast 
  of 
  the 
  bridge 
  

   over 
  Cave 
  Gulch. 
  Very 
  little 
  material 
  was 
  obtained 
  at 
  this 
  locality. 
  

  

  24LC20. 
  SWJ^NEK 
  sec. 
  11, 
  T. 
  10 
  N., 
  R. 
  1 
  W., 
  of 
  the 
  Montana 
  

   prime 
  meridian, 
  about 
  1 
  mile 
  east 
  of 
  Canyon 
  Ferry, 
  Lewis 
  and 
  Clark 
  

   County, 
  Mont. 
  This 
  locality 
  lies 
  across 
  Magpie 
  Gulch, 
  about 
  % 
  mile 
  

   north 
  of 
  locality 
  No. 
  24LC18, 
  and 
  represents 
  the 
  lower 
  levels 
  of 
  that 
  

   locality. 
  Only 
  a 
  very 
  small 
  fauna 
  was 
  obtained 
  here. 
  

  

  Middle 
  Miocene 
  (Hemingfordian) 
  Localities 
  

  

  24LC21. 
  SEKNW}^ 
  sec. 
  13, 
  T. 
  10 
  N., 
  R. 
  1 
  W., 
  of 
  the 
  Montana 
  

   prime 
  meridian, 
  about 
  2 
  miles 
  east 
  and 
  little 
  south 
  of 
  Canyon 
  Ferry, 
  

   Lewis 
  and 
  Clark 
  County, 
  Mont. 
  A 
  few 
  isolated 
  and 
  imperfect 
  Mery- 
  

   chippus 
  teeth 
  were 
  obtained 
  from 
  a 
  buff 
  sandstone 
  resting 
  on 
  a 
  lens 
  of 
  

   fresh-water 
  limestone. 
  These 
  few 
  teeth 
  were 
  the 
  only 
  material 
  

   collected 
  in 
  this 
  locality. 
  

  

  Earl 
  Douglass 
  location. 
  W}^ 
  sec. 
  25, 
  T. 
  9 
  N., 
  R 
  1 
  E., 
  of 
  the 
  Montana 
  

   prime 
  meridian, 
  about 
  8 
  miles 
  east 
  of 
  Winston, 
  Broadwater 
  County, 
  

   Mont. 
  Douglass 
  (1908b, 
  p. 
  274) 
  secured 
  the 
  greater 
  portion 
  of 
  a 
  

   skull, 
  a 
  lower 
  jaw, 
  and 
  some 
  skeletal 
  element 
  of 
  an 
  advanced 
  species 
  of 
  

   Merychippus 
  from 
  the 
  bluffs 
  on 
  the 
  east 
  side 
  of 
  the 
  Missouri 
  River. 
  

   And, 
  as 
  far 
  as 
  I 
  know, 
  no 
  other 
  specimens 
  have 
  been 
  collected 
  from 
  

   this 
  locaHty. 
  

  

  Geology 
  

  

  The 
  Canyon 
  Ferry 
  Reservoir 
  area 
  lies 
  in 
  the 
  reentrant 
  between 
  the 
  

   Big 
  Belt 
  Mountains 
  on 
  the 
  east 
  and 
  the 
  Spokane 
  Hills 
  on 
  the 
  west, 
  at 
  

   the 
  north 
  end 
  of 
  the 
  deformational 
  basin 
  in 
  which 
  the 
  Toston 
  beds 
  of 
  

   Douglass 
  (1901, 
  pp. 
  242-243) 
  were 
  deposited. 
  As 
  near 
  as 
  could 
  be 
  

   determined 
  in 
  the 
  limited 
  time 
  available, 
  the 
  beds 
  are 
  not 
  lithologically 
  

  

  