﻿402 
  G. 
  R. 
  Mansfield 
  — 
  The 
  Wasatch 
  and 
  Salt 
  Lake 
  

  

  relatively 
  fresli 
  condition 
  would 
  make 
  this 
  seem 
  unlikely. 
  

   In 
  the 
  same 
  locality, 
  associated 
  with 
  the 
  conglomerate, 
  

   is 
  a 
  dense 
  tan-colored 
  limestone 
  with 
  included 
  brecciated 
  

   pisolites 
  of 
  dark 
  gray, 
  concentrically 
  banded, 
  crystalline 
  

   limestone, 
  half 
  to 
  three-fourths 
  of 
  an 
  inch 
  in 
  diameter. 
  

   There 
  are 
  also 
  beds 
  of 
  non-pisolitic 
  limestone 
  of 
  similar 
  

   color 
  and 
  appearance. 
  In 
  the 
  Montpelier 
  quadrangle 
  

   coarse 
  red 
  sandstones, 
  locally 
  concretionary, 
  with 
  minor 
  

   amounts 
  of 
  reddish 
  and 
  purplish 
  shales 
  and 
  limestone 
  

   lenses 
  or 
  beds 
  are 
  associated 
  with 
  the 
  conglomerates. 
  

   In 
  the 
  vicinity 
  of 
  Glencoe 
  west 
  of 
  Bear 
  Lake 
  isolated 
  ex- 
  

   posures 
  of 
  white 
  pisolitic 
  limestone, 
  included 
  in 
  an 
  area 
  

   otherwise 
  considered 
  Pliocene 
  (?) 
  may 
  represent 
  inliers 
  

   of 
  Wasatch 
  limestone 
  uncovered 
  by 
  the 
  erosion 
  of 
  white 
  

   Pliocene 
  (?) 
  beds. 
  

  

  The 
  exposed 
  thickness 
  of 
  the 
  Wasatch 
  probably 
  does 
  

   not 
  exceed 
  1,500 
  feet, 
  but 
  the 
  beds 
  have 
  been 
  greatly 
  

   eroded 
  and 
  may 
  have 
  been 
  much 
  thicker. 
  

  

  No 
  fossils 
  of 
  determinative 
  value 
  have 
  been 
  recovered 
  

   from 
  the 
  Wasatch 
  beds 
  in 
  southeastern 
  Idaho 
  but, 
  as 
  

   previously 
  stated, 
  these 
  appear 
  to 
  be 
  continuous 
  in 
  part 
  

   at 
  least 
  with 
  the 
  Knight 
  or 
  Almy 
  formation 
  in 
  south- 
  

   western 
  Wyoming 
  as 
  mapped 
  by 
  Veatch, 
  where 
  the 
  

   Knight 
  beds 
  have 
  yielded 
  both 
  animal 
  and 
  plant 
  remains, 
  

   among 
  them 
  the 
  first 
  vertebrate 
  bones 
  obtained 
  from 
  the 
  

   Wasatch, 
  namely, 
  species 
  of 
  Coryphodon, 
  described 
  by 
  

   Cope 
  as 
  Bathmodon. 
  5 
  

  

  Pliocene 
  (?) 
  series. 
  

  

  Unconformable 
  upon 
  the 
  Wasatch 
  beds 
  in 
  the 
  south- 
  

   western 
  part 
  of 
  the 
  Montpelier 
  quadrangle 
  and 
  elsewhere 
  

   overlying 
  unconformably 
  various 
  pre-Tertiary 
  sediments 
  

   there 
  is 
  a 
  group 
  of 
  generally 
  light-colored, 
  grayish 
  or 
  

   yellowish 
  conglomerates 
  with 
  associated 
  marly, 
  gritty, 
  

   or 
  sandy 
  beds 
  of 
  similar 
  tints 
  that 
  produce 
  white 
  or 
  

   light-colored 
  soils. 
  Few 
  fossils 
  have 
  been 
  found 
  in 
  these 
  

   beds 
  and 
  these 
  furnish 
  no 
  very 
  satisfactory 
  data 
  for 
  age 
  

   determination. 
  The 
  beds 
  are 
  tentatively 
  regarded 
  as 
  of 
  

   Pliocene 
  age 
  and 
  are 
  all 
  included 
  in 
  the 
  Salt 
  Lake 
  for- 
  

   mation. 
  

  

  Salt 
  Lake 
  formation. 
  — 
  In 
  1869 
  the 
  name 
  Salt 
  Lake 
  

  

  Op. 
  cit., 
  pp. 
  89-96, 
  1907. 
  

  

  