﻿REPORT 
  OF 
  THE 
  DIRECTOR 
  10,12 
  87 
  

  

  ceased 
  and 
  the 
  whole 
  southern 
  Adirondack 
  region 
  was 
  raised 
  above 
  

   sea 
  level 
  and 
  underwent 
  erosion. 
  The 
  western 
  portion 
  of 
  this 
  land 
  

   area 
  was 
  of 
  Precambric 
  rock 
  while 
  the 
  surface 
  rock 
  in 
  the 
  eastern 
  

   portion 
  was 
  Little 
  Falls 
  dolomite. 
  

  

  To 
  summarize 
  for 
  the 
  Cambric 
  period 
  : 
  All 
  evidence 
  is 
  decid- 
  

   edly 
  against 
  a 
  complete 
  submergence 
  of 
  the 
  southern 
  Adirondack 
  

   region 
  during 
  the 
  late 
  Cambric 
  period, 
  the 
  land 
  mass 
  of 
  the 
  time 
  

   having 
  occupied 
  at 
  least 
  all 
  of 
  Hamilton 
  county 
  except 
  its 
  south- 
  

   eastern 
  portion; 
  all 
  the 
  northern 
  half 
  of 
  Herkimer 
  county; 
  and 
  

   most 
  of 
  the 
  eastern 
  portion 
  of 
  Lewis 
  county. 
  This 
  axis 
  of 
  ele- 
  

   vation 
  most 
  likely 
  continued 
  northeastwardly 
  through 
  the 
  Adi- 
  

   rondack 
  region 
  to 
  its 
  northeastern 
  portion 
  and 
  occupied 
  about 
  the 
  

   same 
  area 
  as 
  the 
  present 
  main 
  axis 
  of 
  elevation 
  of 
  the 
  mountains. 
  

   The 
  close 
  of 
  the 
  Cambric 
  witnessed 
  an 
  uplift 
  sufficient 
  to 
  convert 
  

   the 
  whole 
  southern 
  Adirondack 
  region 
  into 
  dry 
  land. 
  

  

  ORDOVICIC 
  PHYSIOGRAPHY 
  

  

  Early 
  Ordovicic. 
  According 
  to 
  Ulrich 
  and 
  Cushing 
  16 
  the 
  

   Tribes 
  Hill 
  limestone 
  is 
  the 
  earliest 
  Ordovicic 
  formation. 
  Its 
  

   distribution 
  demonstrates 
  that 
  the 
  Mohawk 
  valley 
  to 
  a 
  little 
  

   northwest 
  of 
  Little 
  Falls 
  and 
  the 
  lower 
  Black 
  river 
  valley 
  were 
  

   submerged. 
  Its 
  total 
  absence 
  from 
  the 
  southwestern 
  Precambric 
  

   boundary, 
  from 
  the 
  outlier 
  at 
  Wells, 
  and 
  from 
  the 
  vicinity 
  of 
  

   Northville 
  and 
  Saratoga 
  Springs 
  strongly 
  suggests 
  that 
  little 
  if 
  

   any 
  of 
  the 
  southern 
  Adirondack 
  region 
  was 
  submerged 
  under 
  the 
  

   Tribes 
  Hill 
  sea. 
  This 
  limestone 
  is 
  probably 
  not 
  present 
  in 
  the 
  

   Champlain 
  valley 
  but, 
  if 
  it 
  is, 
  a 
  little 
  of 
  the 
  eastern 
  border 
  of 
  the 
  

   Adirondacks 
  may 
  have 
  been 
  submerged. 
  It 
  would 
  seem, 
  there- 
  

   fore, 
  that 
  this 
  Tribes 
  Hill 
  submergence 
  was 
  not 
  as 
  extensive 
  as 
  

   that 
  of 
  Little 
  Falls 
  time. 
  After 
  the 
  deposition 
  of 
  the 
  Tribes 
  Hill 
  

   limestone, 
  however, 
  there 
  was 
  a 
  long 
  erosion 
  interval 
  continuing 
  

   to 
  Black 
  River 
  time 
  and 
  hence 
  because 
  of 
  removal 
  of 
  Tribes 
  Hill 
  

   limestone 
  by 
  this 
  erosion 
  it 
  is 
  more 
  than 
  likely 
  that 
  the 
  present 
  

   outcrops 
  do 
  not 
  indicate 
  the 
  full 
  extent 
  of 
  the 
  Tribes 
  Hill 
  sea. 
  

   At 
  any 
  rate 
  there 
  is 
  not 
  the 
  slightest 
  direct 
  evidence 
  for 
  any 
  con- 
  

   siderable 
  submergence 
  of 
  the 
  southern 
  Adirondack 
  area 
  at 
  this 
  

   time. 
  

  

  During 
  the 
  long 
  interval 
  between 
  Tribes 
  Hill 
  and 
  Black 
  River 
  

   times 
  the 
  whole 
  southern 
  Adirondack 
  region 
  was 
  above 
  sea 
  level 
  

   except 
  locally 
  along 
  the 
  western 
  border 
  for 
  a 
  short 
  time 
  when 
  

  

  w 
  Pages 
  128-30. 
  

  

  