﻿6 
  4 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Briefly 
  summarized 
  : 
  No 
  deposition 
  of 
  Jurassic 
  strata 
  occurred 
  

   within 
  the 
  borders 
  of 
  New 
  York 
  State 
  but 
  instead, 
  the 
  region 
  zvas 
  

   well 
  above 
  zvater 
  and 
  undergoing 
  active 
  erosion 
  so 
  that 
  by 
  the 
  close 
  

   of 
  the 
  period 
  this 
  region, 
  as 
  well 
  as 
  the 
  whole 
  Atlantic 
  slope, 
  had 
  

   been 
  worn 
  down 
  to 
  the 
  condition 
  of 
  a 
  fairly 
  good 
  peneplain. 
  

  

  CRETACIC 
  HISTORY 
  

  

  The 
  Cretacic 
  period 
  opened 
  with 
  the 
  eastern 
  coast 
  line 
  of 
  the 
  

   eastern 
  United 
  States 
  somewhat 
  farther 
  out 
  than 
  it 
  now 
  is, 
  but 
  

   early 
  in 
  that 
  period 
  there 
  was 
  enough 
  subsidence, 
  or 
  possibly 
  warp- 
  

  

  Fig. 
  21 
  Generalized 
  map 
  of 
  North 
  America 
  in 
  the 
  Upper 
  Cretacic 
  period, 
  

   showing 
  the 
  relations 
  of 
  land 
  and 
  water. 
  Horizontal 
  lined 
  areas 
  — 
  land 
  ; 
  

   blank 
  areas 
  = 
  water. 
  The 
  sea 
  then 
  spread 
  over 
  the 
  Atlantic 
  coastal 
  plain 
  

   region 
  including 
  Long 
  and 
  Staten 
  Islands 
  of 
  New 
  York. 
  During 
  the 
  next 
  

   (Teritary) 
  period, 
  the 
  conditions 
  were 
  much 
  the 
  same 
  along 
  the 
  Atlantic 
  

   and 
  Gulf 
  coasts, 
  but 
  in 
  the 
  west 
  the 
  great 
  interior 
  sea 
  had 
  disappeared. 
  

  

  