﻿418 
  Forty-seventh 
  Report 
  on 
  tee 
  State 
  Museum. 
  

  

  general 
  but 
  moderate 
  difference 
  in 
  the 
  amount 
  of 
  dip. 
  In 
  Orange 
  

   county 
  the 
  divergence 
  in 
  dip 
  is 
  as 
  great 
  as 
  at 
  Rondout, 
  as 
  is 
  

   exhibited 
  in 
  the 
  well-known 
  cut 
  west 
  of 
  Otisville. 
  I 
  have 
  not 
  

   seen 
  this 
  cut 
  recently, 
  and 
  I 
  never 
  satisfied 
  myself 
  as 
  to 
  whether 
  

   the 
  relations 
  there 
  were 
  due 
  to 
  a 
  fault 
  or 
  entirely 
  to 
  uncon- 
  

   formity. 
  

  

  The 
  general 
  history 
  of 
  the 
  overlaps 
  above 
  described 
  is 
  quite 
  

   obvious, 
  but 
  the 
  precise 
  sequence 
  of 
  events 
  and 
  their 
  local 
  features 
  

   are 
  not 
  elucidated. 
  The 
  principal 
  factor 
  has 
  been 
  a 
  series 
  of 
  

   uplifts 
  or 
  deformations, 
  attended 
  with 
  some 
  deposition, 
  in 
  the 
  

   eastern 
  and 
  east-central 
  New 
  York 
  region 
  during 
  upper 
  Silurian 
  

   times. 
  Westward 
  the 
  deformation 
  was 
  monoclinal, 
  tilting 
  east- 
  

   ward 
  ; 
  in 
  the 
  Hudson 
  valley 
  region 
  there 
  was 
  a 
  flexing 
  preceding 
  

   the 
  Oneida 
  deposition. 
  The 
  uplift 
  was 
  attended 
  by 
  more 
  or 
  less 
  

   planing 
  throughout, 
  but 
  apparently 
  both 
  planing 
  and 
  deposition 
  

   were 
  moderate 
  in 
  amount. 
  It 
  is 
  the 
  irregularity 
  in 
  sequence 
  of 
  

   overlaps 
  eastward 
  from 
  Utica 
  and 
  in 
  the 
  region 
  south 
  of 
  Rondout 
  

   that 
  indicated 
  a 
  succession 
  of 
  uplifts. 
  I 
  believe 
  that 
  the 
  overlap- 
  

   ping 
  formations 
  extend 
  continuously 
  from 
  the 
  Utica 
  region 
  to 
  

   the 
  Shawangunk 
  mountains' 
  and 
  New 
  Jersey 
  off 
  to 
  the 
  south- 
  

   west 
  and 
  south 
  along 
  shore 
  lines 
  trending 
  southeast 
  and 
  south. 
  

   I 
  interpret 
  the 
  overlaps 
  eastward 
  from 
  Utica 
  as 
  follows 
  : 
  During 
  

   the 
  Oneida-Medina 
  deposition 
  in 
  central 
  New 
  York 
  there 
  was 
  a 
  

   shore 
  eastward 
  of 
  Hudson 
  river 
  sediments 
  uplifted 
  by 
  a 
  pre- 
  

   ceding 
  deformation. 
  This 
  shore 
  was 
  overlapped 
  more 
  or 
  less 
  

   widely 
  by 
  Medina 
  deposits, 
  which 
  were 
  in 
  turn 
  overlapped 
  by 
  the 
  

   Clinton 
  deposits. 
  Whether 
  there 
  was 
  uplift 
  and 
  erosion 
  of 
  the 
  

   Medina 
  deposits 
  eastward 
  preceding 
  Clinton 
  deposition 
  is 
  not 
  

   known, 
  nor 
  is 
  it 
  known 
  whether 
  the 
  Clinton 
  overlap 
  represents 
  the 
  

   latest 
  deposits 
  of 
  the 
  Clinton 
  or 
  the 
  attenuated 
  representatives 
  of 
  

   all 
  the 
  Clinton. 
  The 
  outlier 
  of 
  Clinton 
  at 
  Schoharie 
  may 
  be 
  due 
  to 
  

   a 
  local 
  ba}^ 
  from 
  the 
  south 
  or 
  isolated 
  by 
  erosion. 
  The 
  limits 
  of 
  

   Niagara 
  deposition 
  are 
  not 
  apparent, 
  and 
  whether 
  the 
  thinni 
  ug 
  

   out 
  in 
  the 
  several 
  areas 
  is 
  due 
  to 
  non-deposition 
  or 
  erosion 
  is 
  not 
  

   determined. 
  Preceding 
  the 
  deposition 
  of 
  the 
  earlier 
  Salina 
  

   formations 
  in 
  the 
  Utica 
  region 
  there 
  was 
  uplift 
  eastward, 
  and 
  

   emerged 
  areas 
  of 
  Niagara, 
  Clinton 
  and 
  "Hudson 
  river 
  formation 
  

   were 
  subjected 
  to 
  a 
  greater 
  or 
  less 
  amount 
  of 
  erosion. 
  The 
  earlier 
  

   Salina 
  deposits 
  overlapped 
  the 
  Niagara 
  a 
  short 
  distance 
  east 
  of 
  

  

  