﻿174 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  steepness 
  of 
  gradient 
  of 
  river 
  course 
  and 
  dip 
  of 
  rocks, 
  where 
  the 
  

   two 
  are 
  equally 
  directed, 
  should 
  assume 
  large 
  proportions 
  since 
  

   this 
  would 
  presuppose 
  but 
  a 
  slight 
  difference 
  of 
  steepness 
  in 
  the 
  

   two 
  and 
  a 
  like 
  direction 
  over 
  a 
  long 
  distance. 
  Nevertheless 
  the 
  

   geologic 
  maps 
  reveal 
  such 
  large 
  inliers. 
  An 
  especially 
  clear 
  ex- 
  

   ample 
  seems 
  to 
  be 
  that 
  of 
  the 
  inliers 
  on 
  the 
  coastal 
  plain 
  of 
  the 
  

   Carolinas^ 
  [sec 
  text 
  fig. 
  13]. 
  There 
  we 
  see 
  the 
  Upper 
  Cretaceous 
  

  

  Fig. 
  13 
  Inliers 
  of 
  Upper 
  Cretaceous 
  

   and 
  Eocene 
  |^^^^^ 
  i^ 
  the 
  Carolinas. 
  Scale 
  susocytsTj 
  

  

  appear 
  in 
  long 
  tortuous 
  strips, 
  70 
  miles 
  and 
  more 
  in 
  length, 
  from 
  

   under 
  the 
  Neogen 
  along 
  the 
  Pedee 
  river, 
  the 
  branches 
  of 
  Cape 
  

   Fear 
  river 
  and 
  Neuse 
  river, 
  in 
  order 
  to 
  disappear 
  again 
  under 
  

   tertiary 
  beds 
  above 
  the 
  mouths 
  of 
  these 
  rivers. 
  The 
  relations 
  of 
  

   the 
  strike 
  of 
  the 
  tertiary 
  and 
  cretaceous 
  formations 
  and 
  of 
  the 
  

   courses 
  of 
  the 
  rivers 
  to 
  the 
  coast 
  line 
  indicate, 
  that 
  the 
  dips 
  and 
  

   river 
  courses 
  are 
  approximately 
  coincident. 
  

  

  b 
  Solution 
  inliers. 
  In 
  some 
  of 
  the 
  small 
  inliers 
  of 
  Lowville 
  lime- 
  

   stone 
  in 
  the 
  Black 
  River 
  limestofie 
  of 
  the 
  Watertown 
  region, 
  there 
  

   is 
  fair 
  evidence 
  that 
  solution 
  has 
  played 
  an 
  important 
  part 
  in 
  the 
  

   removal 
  of 
  the 
  overlying 
  rock. 
  This 
  is 
  especially 
  the 
  case 
  in 
  the 
  

   inlier 
  along 
  Perch 
  river 
  below 
  Limerick 
  [see 
  text 
  fig. 
  14, 
  15]. 
  

   The 
  longitudinal 
  section 
  shows 
  that 
  the 
  river 
  plunges 
  with 
  a 
  high 
  

   fall 
  from 
  the 
  Black 
  River 
  into 
  the 
  Lowville, 
  upon 
  whose 
  hard 
  bed 
  

   it 
  flows 
  for 
  half 
  a 
  mile 
  in 
  order 
  to 
  disappear 
  above 
  the 
  '' 
  Natural 
  

   Bridge 
  " 
  under 
  the 
  Black 
  River 
  limestone. 
  Just 
  to 
  the 
  south 
  of 
  the 
  

  

  ^ 
  Willis, 
  B. 
  Carte 
  Geologique 
  del' 
  Amerique 
  du 
  Nord. 
  1906. 
  

  

  