﻿GEOLOGY 
  OF 
  SARATOGA 
  SPRINGS 
  AND 
  VICINITY 
  37 
  

  

  FEET 
  INCHES 
  

  

  12 
  Light 
  colored, 
  vitreous 
  sandstone 
  i 
  3 
  

  

  1 
  1 
  Gray, 
  banded 
  sandstone, 
  slightly 
  calcareous 
  3 
  9 
  

  

  10 
  Alternating 
  calcareous 
  sandstone 
  and 
  crystalline 
  

   dolomite 
  of 
  blue 
  gray 
  color, 
  large 
  nodules 
  of 
  

  

  crystalline 
  calcite 
  in 
  the 
  latter 
  ; 
  base 
  of 
  cut 
  3 
  .... 
  

  

  9 
  Concealed 
  between 
  this 
  and 
  next 
  cut 
  east; 
  arbi- 
  

   trary 
  boundary 
  between 
  Theresa 
  and 
  Potsdam 
  

  

  in 
  the 
  interval 
  ; 
  about 
  30 
  .... 
  

  

  8 
  Hard, 
  vitreous, 
  light 
  colored 
  sandstone 
  with 
  

  

  darker 
  calcareous 
  sandstone 
  above 
  and 
  below. 
  . 
  1 
  8 
  

  

  7 
  Concealed 
  to 
  brook 
  exposures 
  next 
  east 
  ; 
  about 
  ... 
  30 
  .... 
  

   6 
  Light 
  colored, 
  vitreous 
  sandstone, 
  with 
  alternat- 
  

   ing 
  layers 
  of 
  darker, 
  calcareous 
  sandstone 
  which 
  

  

  weather 
  rapidly 
  30 
  

  

  5 
  Light 
  colored, 
  vitreous 
  sandstone 
  15 
  

  

  4 
  Concealed 
  4 
  

  

  3 
  Light 
  colored, 
  vitreous 
  sandstone 
  2 
  

  

  2 
  Concealed 
  4 
  

  

  1 
  Conglomerate, 
  increasing 
  in 
  coarseness 
  downward 
  

  

  and 
  reaching 
  nearly 
  to 
  base 
  of 
  formation 
  10 
  .... 
  

  

  Numbers 
  1 
  to 
  8 
  are 
  regarded 
  as 
  constituting 
  the 
  Potsdam 
  though 
  

   there 
  is 
  some 
  question 
  about 
  the 
  classification 
  of 
  7 
  and 
  8, 
  which 
  

   may 
  be 
  Theresa. 
  If 
  they 
  are 
  regarded 
  as 
  Potsdam, 
  that 
  formation 
  

   has 
  a 
  thickness 
  of 
  96 
  feet, 
  8 
  inches 
  in 
  the 
  section, 
  with 
  the 
  base 
  

   not 
  reached, 
  though 
  it 
  can 
  not 
  be 
  more 
  than 
  a 
  few 
  feet 
  away. 
  

   Above 
  is 
  a 
  thickness 
  of 
  52 
  feet 
  of 
  beds 
  which 
  are 
  certainly 
  to 
  be 
  

   classed 
  as 
  Theresa, 
  and 
  occasional 
  beds 
  of 
  sandstone 
  run 
  still 
  

   higher. 
  

  

  The 
  State 
  road 
  out 
  of 
  Saratoga 
  toward 
  Corinth 
  crosses 
  the 
  

   Adirondack 
  Railroad 
  in 
  a 
  low 
  depression 
  between 
  two 
  rock 
  cuts. 
  

   The 
  easterly 
  one 
  of 
  these 
  is 
  the 
  one 
  in 
  which 
  the 
  upper 
  part 
  of 
  the 
  

   above 
  section 
  was 
  measured, 
  nos. 
  10 
  to 
  21. 
  It 
  is 
  the 
  most 
  ac- 
  

   cessible 
  locality 
  within 
  the 
  district 
  about 
  Saratoga 
  where 
  the 
  

   Theresa 
  formation 
  is 
  well 
  shown. 
  A 
  photograph 
  of 
  the 
  rock 
  wall 
  

   of 
  the 
  cut 
  is 
  shown 
  in 
  plate 
  1, 
  the 
  extended 
  hand 
  resting 
  on 
  the 
  

   fossiliferous 
  layer, 
  no. 
  15 
  of 
  the 
  section. 
  From 
  this 
  we 
  obtained 
  

   species 
  of 
  Ptychoparia 
  and 
  Agraulos 
  which 
  are 
  specifically 
  

   different 
  from 
  the 
  forms 
  found 
  in 
  the 
  Hoyt 
  limestone 
  above. 
  The 
  

   species 
  collected 
  here 
  were, 
  in 
  addition 
  to 
  Lingulella 
  

  

  