﻿78 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  These 
  f 
  aunules 
  demonstrate 
  the 
  Beekmantown 
  age 
  of 
  the 
  lime- 
  

   stone 
  and 
  indicate 
  that 
  it 
  is 
  to 
  be 
  correlated 
  roughly 
  to 
  the 
  Fort 
  

   Cassin 
  beds, 
  which 
  correspond 
  to 
  unknown 
  parts 
  of 
  Brainerd 
  & 
  

   Seely's 
  divisions 
  D 
  and 
  E. 
  Since, 
  however, 
  this 
  belt 
  of 
  Beekman- 
  

   town 
  rocks 
  fully 
  corresponds 
  to 
  the 
  Fort 
  Cassin 
  beds, 
  neither 
  in 
  its 
  

   lithology 
  nor 
  in 
  its 
  faunal 
  aspect 
  or 
  its 
  stratigraphy, 
  we 
  consider 
  it 
  

   unsafe 
  to 
  correlate 
  it 
  with 
  the 
  Fort 
  Cassin 
  and 
  shall 
  designate 
  the 
  

   beds 
  as 
  Bald 
  Mountain 
  limestone. 
  

  

  The 
  fauna 
  of 
  the 
  Bald 
  Mountain 
  limestone 
  is 
  distinct 
  from 
  the 
  

   Fort 
  Cassin 
  fauna, 
  on 
  the 
  one 
  hand 
  in 
  the 
  entire 
  absence 
  of 
  the 
  

   coiled 
  nautiloid 
  cephalopods 
  so 
  characteristic 
  of 
  that 
  fauna, 
  and, 
  

   on 
  the 
  other 
  hand, 
  by 
  the 
  prevalence 
  of 
  striking 
  Eccyliopteri, 
  which, 
  

   according 
  to 
  Ulrich, 
  are 
  identical 
  with 
  forms 
  occurring 
  in 
  the 
  Cana- 
  

   dian 
  of 
  Missouri. 
  

  

  The 
  Bald 
  Mountain 
  limestone 
  can 
  neither 
  be 
  correlated 
  nor 
  be 
  

   continuous 
  with 
  the 
  limestones 
  and 
  dolomites 
  outcropping 
  at 
  the 
  

   foot 
  of 
  the 
  Adirondacks 
  only 
  a 
  short 
  distance 
  to 
  the 
  west 
  on 
  the 
  

   Saratoga 
  quadrangle, 
  since 
  these 
  beds, 
  though 
  formerly 
  referred 
  to 
  

   the 
  Calciferous 
  or 
  Beekmantown, 
  are 
  now 
  known 
  to 
  represent 
  only 
  

   the 
  lowest 
  division 
  A, 
  and 
  perhaps 
  part 
  of 
  B, 
  which 
  are 
  separated 
  by 
  

   a 
  great 
  unconformity 
  from 
  the 
  Beekmantown 
  and 
  are 
  claimed 
  even 
  

   to 
  belong 
  to 
  another 
  system 
  (Ozarkic 
  of 
  Ulrich). 
  It 
  is 
  possible 
  

   that 
  the 
  Bald 
  Mountain 
  limestone 
  finds 
  its 
  continuation 
  80 
  miles 
  

   farther 
  south 
  in 
  the 
  Wappinger 
  limestone 
  in 
  southeastern 
  New 
  

   York, 
  but 
  the 
  latter 
  belt 
  includes 
  limestones 
  of 
  Hoyt, 
  Beekmantown, 
  

   and 
  Mohawkian 
  ages, 
  and 
  the 
  name 
  is 
  therefore 
  not 
  applicable 
  to 
  

   the 
  possible 
  northern 
  continuation 
  of 
  its 
  Beekmantown 
  portion. 
  

  

  The 
  lower 
  part 
  of 
  this 
  formation 
  consists 
  of 
  dark 
  gray 
  (but 
  sandy 
  

   gray 
  when 
  weathered), 
  massive, 
  often 
  sandy 
  and 
  also 
  brecciated, 
  

   practically 
  barren 
  dolomite 
  1 
  of 
  which 
  we 
  have 
  seen 
  40 
  feet 
  or 
  more, 
  

   some 
  in 
  beds 
  as 
  much 
  as 
  6 
  feet 
  thick. 
  It 
  is 
  well 
  seen 
  in 
  several 
  

   places, 
  namely, 
  an 
  old 
  quarry 
  on 
  the 
  west 
  bank 
  of 
  the 
  Batten 
  kill 
  

   half 
  a 
  mile 
  south 
  of 
  Middle 
  Falls, 
  in 
  an 
  abandoned 
  quarry 
  on 
  a 
  

   hill 
  at 
  the 
  west 
  foot 
  of 
  Louse 
  hill 
  2}4 
  miles 
  south 
  of 
  Middle 
  Falls 
  

   and 
  in 
  a 
  quarry 
  by 
  the 
  road 
  south 
  of 
  Bald 
  mountain. 
  This, 
  like 
  

   all 
  the 
  limestone 
  and 
  dolomite 
  on 
  Bald 
  mountain, 
  is 
  referred 
  to 
  the 
  

   Calciferous 
  by 
  Emmons 
  and 
  it 
  is 
  the 
  Calciferous 
  sandrock 
  of 
  Wal- 
  

   cott's 
  Bald 
  Mountain 
  section. 
  It 
  is 
  in 
  the 
  neighborhood 
  of 
  Bald 
  

  

  X 
  A 
  few 
  sections 
  suggestive 
  of 
  cephalopods 
  and 
  Ophileta 
  were 
  observed 
  in 
  

   calcareous 
  layers. 
  

  

  