﻿CLASSIFICATION, 
  ETC. 
  OF 
  HAMILTON 
  AND 
  CHEMUNG 
  SERIES 
  259 
  

  

  in 
  the 
  upper 
  part 
  of 
  the 
  Sherburne 
  formation. 
  This 
  upper 
  part 
  

   of 
  the 
  Sherburne 
  formation 
  is 
  shown 
  at 
  various 
  places 
  along 
  the 
  

   lower 
  valley 
  of 
  Tenmile 
  creek 
  to 
  its 
  junction 
  with 
  the 
  Catskill 
  

   in 
  the 
  northern 
  part 
  of 
  Greene 
  co. 
  and 
  for 
  some 
  distance 
  along 
  

   the 
  valley 
  of 
  the 
  latter 
  creek 
  both 
  below 
  and 
  above 
  the 
  mouth 
  of 
  

   Tenmile 
  creek. 
  The 
  lower 
  line 
  of 
  the 
  Oneonta 
  formation 
  along 
  

   these 
  two 
  creeks 
  is 
  quite 
  accurately 
  shown 
  on 
  the 
  Geologic 
  map 
  of 
  

   New 
  York 
  except 
  that 
  it 
  is 
  carried 
  several 
  miles 
  too 
  far 
  down 
  the 
  

   Catskill 
  creek 
  valley. 
  

  

  Westerlo 
  

   To 
  the 
  east 
  of 
  Rensselaerville 
  and 
  south 
  of 
  the 
  eastern 
  half 
  of 
  

   Berne 
  township 
  is 
  Westerlo 
  which 
  occupies 
  a 
  central 
  position 
  in 
  

   the 
  southern 
  tier 
  of 
  townships 
  in 
  Albany 
  co. 
  The 
  principal 
  

   streams 
  are 
  Basic 
  creek 
  which 
  rises 
  in 
  the 
  northern 
  part 
  and 
  

   flows 
  southerly 
  across 
  the 
  central 
  part 
  of 
  the 
  township, 
  Eight 
  

   Mile 
  creek 
  which 
  rises 
  in 
  the 
  western 
  part 
  and 
  flows 
  southwesterly 
  

   into 
  Tenmile 
  creek 
  and 
  Hannecrois 
  creek 
  which 
  flows 
  across 
  the 
  

   northeastern 
  portion 
  of 
  the 
  township. 
  The 
  general 
  elevation 
  is 
  

   less 
  than 
  that 
  of 
  Rensselaerville 
  or 
  Berne 
  townships 
  and 
  the 
  vari- 
  

   ous 
  ridges 
  extending 
  in 
  a 
  general 
  north 
  and 
  south 
  direction 
  are 
  not 
  

   as 
  steep. 
  The 
  western 
  half 
  of 
  the 
  township 
  is 
  quite 
  heavily 
  covered 
  

   with 
  drift 
  so 
  that 
  any 
  considerable 
  exposures 
  of 
  the 
  underlying 
  

   rocks 
  are 
  infrequent. 
  

  

  XXX 
  D 
  1 
  . 
  On 
  the 
  western 
  side 
  and 
  near 
  the 
  top 
  of 
  the 
  low 
  hill 
  

   about 
  one 
  half 
  mile 
  west 
  of 
  Dormansville 
  is 
  oneof 
  theDormansville 
  

   flagstone 
  quarries. 
  At 
  the 
  base 
  are 
  three 
  and 
  a 
  half 
  feet 
  of 
  

   bluish 
  flags 
  on 
  a 
  weathered 
  surface 
  turning 
  slightly 
  reddish, 
  the 
  

   shaly 
  partings 
  of 
  which 
  contain 
  fossils. 
  Above 
  are 
  eight 
  feet 
  of 
  

   bluish, 
  argillaceous, 
  somewhat 
  blocky 
  shales 
  which 
  are 
  quite 
  

   barren 
  of 
  fossils, 
  next, 
  a 
  stratum 
  of 
  sandstone 
  one 
  and 
  a 
  half 
  

   feet 
  in 
  thickness 
  covered 
  by 
  another 
  stratum 
  of 
  somewhat 
  blocky, 
  

   argillaceous 
  shales 
  in 
  which 
  small 
  Hamilton 
  lamellibranchs 
  

   are 
  abundant. 
  These 
  rocks 
  have 
  the 
  lithological 
  appearance 
  of 
  

   the 
  Hamilton 
  and 
  contain 
  its 
  fauna 
  and 
  are 
  clearly 
  in 
  this 
  forma- 
  

   tion. 
  The 
  following 
  species 
  were 
  collected: 
  

  

  