﻿142 
  Scientific 
  Intelligence. 
  

  

  Nos. 
  690, 
  691. 
  Contributions 
  to 
  economic 
  geology. 
  No. 
  690, 
  

   1918, 
  I. 
  Parts 
  B, 
  C, 
  D, 
  E, 
  F. 
  No. 
  691, 
  1918. 
  II. 
  Parts 
  B, 
  

   D, 
  H. 
  

  

  Water-Supply 
  Papers. 
  — 
  Nos. 
  409, 
  412, 
  413. 
  Surface 
  Water 
  

   Supply 
  of 
  the 
  United 
  States, 
  1915. 
  Nathan 
  C. 
  Grover, 
  Chief 
  

   Hydraulic 
  Engineer. 
  No. 
  409, 
  IX, 
  Colorado 
  River 
  basin. 
  No. 
  

   412, 
  XII, 
  A. 
  Pacific 
  Slope 
  basins 
  in 
  Washington 
  and 
  Upper 
  

   Columbia 
  river 
  basin. 
  No. 
  413, 
  XII, 
  B, 
  Snake 
  river 
  basin. 
  No. 
  

   414, 
  XII, 
  Lower 
  Columbia 
  river 
  and 
  Pacific 
  drainage 
  basins 
  in 
  

   Oregon. 
  

  

  Nos. 
  431, 
  432, 
  433, 
  435, 
  437. 
  Surface 
  Water 
  Supply 
  of 
  the 
  

   United 
  States, 
  1916. 
  No. 
  431, 
  I, 
  North 
  Atlantic 
  Slope 
  basins. 
  

   No. 
  432, 
  II, 
  South 
  Atlantic 
  and 
  Eastern 
  Gulf 
  of 
  Mexico 
  basins. 
  

   No. 
  433, 
  III, 
  Ohio 
  River 
  basin. 
  No. 
  435, 
  Y, 
  Hudson 
  Bay 
  and 
  

   Upper 
  Mississippi 
  basins. 
  No. 
  437, 
  VII, 
  Lower 
  Mississippi 
  

   River 
  basin. 
  No. 
  441, 
  XI, 
  Pacific 
  Slope 
  basins 
  in 
  California. 
  

  

  No. 
  425. 
  Ground 
  water 
  for 
  irrigation 
  in 
  Lodgepole 
  valley, 
  

   Wyoming 
  and 
  Nebraska 
  ; 
  by 
  0. 
  E. 
  Meinzer. 
  Pp. 
  37-69; 
  3 
  pis., 
  

   lfig. 
  

  

  No. 
  426. 
  Southern 
  California 
  floods 
  of 
  January, 
  1916; 
  by 
  

   H. 
  D. 
  McGlashan 
  and 
  F. 
  C. 
  Ebert. 
  Pp. 
  88 
  ; 
  17 
  pis. 
  

  

  No. 
  428. 
  Artesian 
  waters 
  in 
  the 
  vicinity 
  of 
  the 
  Black 
  Hills. 
  

   South 
  Dakota 
  ; 
  by 
  N. 
  H. 
  Darton. 
  Pp. 
  64 
  ; 
  13 
  pis., 
  11 
  figs. 
  

  

  No. 
  465. 
  Surface 
  water 
  supply 
  of 
  Hawaii, 
  July 
  1, 
  1916, 
  to 
  

   June 
  30, 
  1917. 
  

  

  3. 
  Geology 
  and 
  Paleontology 
  of 
  the 
  Baton 
  Mesa 
  and 
  Other 
  

   Regions 
  in 
  Colorado 
  and 
  New 
  Mexico; 
  by 
  Willis 
  T. 
  Lee 
  and 
  

   F. 
  H. 
  Knowlton. 
  U. 
  S. 
  Geological 
  Survey, 
  Professional 
  Paper 
  

   101. 
  Pp. 
  450, 
  pis. 
  103, 
  figs. 
  16. 
  Washington, 
  1917.— 
  The 
  work 
  

   of 
  Willis 
  T. 
  Lee 
  in 
  southeastern 
  Colorado 
  and 
  northeastern 
  

   New 
  Mexico 
  has 
  resulted 
  in 
  a 
  new 
  interpretation 
  of 
  the 
  age 
  and 
  

   relations 
  of 
  the 
  Cretaceous 
  and 
  Tertiary 
  formations. 
  The 
  con- 
  

   fusing 
  and 
  contradictory 
  conclusions 
  of 
  previous 
  workers 
  have 
  

   been 
  re-examined 
  on 
  the 
  basis 
  of 
  extensive 
  field 
  work 
  and 
  the 
  

   facts 
  of 
  age 
  and 
  structure 
  built 
  into 
  a 
  logical, 
  connected 
  history. 
  

   The 
  coal-bearing 
  rocks 
  formerly 
  assigned 
  to 
  the 
  Laramie 
  were 
  

   found 
  to 
  consist 
  of 
  two 
  distinct 
  formations, 
  neither 
  of 
  which 
  is 
  

   Laramie 
  ; 
  the 
  lower, 
  Vermejo, 
  is 
  the 
  equivalent 
  of 
  the 
  Fox 
  Hill, 
  

   and 
  the 
  upper, 
  Raton, 
  is 
  Eocene. 
  The 
  unconformity 
  separating 
  

   Cretaceous 
  from 
  the 
  lowest 
  Tertiary 
  was 
  found 
  to 
  exist 
  in 
  all 
  

   the 
  coal 
  fields 
  west 
  of 
  the 
  Rocky 
  Mountains 
  and 
  is 
  to 
  be 
  corre- 
  

   lated 
  with 
  the 
  post-Cretaceous 
  unconformity 
  along 
  the 
  eastern 
  

   mountain 
  front. 
  The 
  field 
  methods 
  devised 
  to 
  test 
  this 
  con- 
  

   clusion 
  yielded 
  a 
  large 
  amount 
  of 
  satisfactory 
  evidence 
  — 
  struc- 
  

   tural, 
  paleontologic, 
  diastrophic, 
  and 
  paleophysiographic 
  — 
  and 
  

   demonstrated 
  that 
  the 
  most 
  significant 
  unconformities 
  are 
  by 
  

   no 
  means 
  the 
  most 
  conspicuous. 
  The 
  methods 
  used 
  by 
  Lee 
  

   should 
  find 
  general 
  application. 
  

  

  An 
  examination 
  of 
  the 
  evidence 
  afforded 
  by 
  plants 
  has 
  led 
  

  

  