﻿GEOLOGY 
  OF 
  SARATOGA 
  SPRINGS 
  AND 
  VICINITY 
  JJ 
  

  

  As 
  far 
  as 
  the 
  part 
  of 
  the 
  limestone 
  belt 
  on 
  the 
  Schuylerville 
  sheet 
  

   is 
  concerned, 
  our 
  collections 
  have 
  shown 
  that 
  one 
  must 
  there 
  sharply 
  

   distinguish 
  between 
  the 
  dolomite 
  and 
  limestone 
  on 
  one 
  hand, 
  and 
  

   the 
  conglomerate 
  on 
  the 
  other, 
  for 
  the 
  former 
  have 
  only 
  furnished 
  

   fossils 
  of 
  Beekmantown 
  age, 
  and 
  the 
  latter 
  such 
  indicating 
  Black 
  

   river 
  to 
  Trenton 
  age. 
  

  

  The 
  principal 
  fossiliferous 
  outcrops 
  of 
  the 
  limestones 
  are 
  found 
  in 
  

   the 
  neighborhood 
  of 
  Middle 
  Falls. 
  The 
  most 
  important 
  one 
  is 
  an 
  

   old 
  quarry, 
  one-quarter 
  of 
  a 
  mile 
  above 
  the 
  village 
  at 
  the 
  bend 
  of 
  

   the 
  river, 
  where 
  about 
  25 
  feet 
  of 
  highly 
  fossiliferous 
  limestone 
  are 
  

   exposed. 
  This 
  locality 
  has 
  furnished 
  : 
  

  

  Cryptozoon 
  sp. 
  

  

  Girvanella 
  sp. 
  

  

  Undescribed 
  sponges 
  

  

  Eccyliopterus 
  planidorsalis 
  Ulrich 
  MS 
  

  

  E. 
  planibasalis 
  Ulrich 
  MS 
  

  

  Oxydiscus 
  sp. 
  nov. 
  

  

  Hormotoma? 
  (Murchisonia) 
  cassina 
  (Whitfield), 
  section 
  

  

  Segments 
  of 
  trilobites 
  

  

  A 
  small 
  knoll 
  at 
  the 
  northern 
  outskirt 
  of 
  Middle 
  Falls 
  was 
  found 
  

   to 
  contain 
  specimens 
  of 
  

  

  Polytoechia 
  apicalis 
  (Whitfield) 
  

   cf. 
  Protorthis 
  minima 
  Whitfield 
  

  

  Along 
  the 
  road 
  from 
  Middle 
  Falls 
  to 
  Bald 
  mountain, 
  dolomite 
  

   and 
  limestone 
  outcrops 
  are 
  observed 
  on 
  both 
  sides 
  ; 
  one 
  of 
  these, 
  

   west 
  of 
  the 
  road 
  and 
  halfway 
  between 
  Bald 
  mountain 
  and 
  Middle 
  

   Falls, 
  contained 
  in 
  the 
  limestone, 
  ostracods 
  (undescribed 
  species 
  of 
  

   Primitia 
  and 
  Leperditia) 
  and 
  fragments 
  of 
  trilobites. 
  

  

  The 
  limestone 
  of 
  the 
  Bald 
  mountain 
  quarry 
  contains 
  cephalopods 
  

   and 
  gastropods, 
  namely 
  : 
  

  

  Cryptozoon 
  sp. 
  

  

  Eccyliopterus 
  planidorsalis 
  Ulrich 
  MS 
  

   E. 
  planibasalis 
  Ulrich 
  MS 
  

   Liospira 
  ? 
  ,y/\ 
  (section) 
  

   Cameroceras 
  brainerdi 
  ( 
  Whitfield) 
  

   Cyrtoceras 
  confertissimum 
  Whitfield 
  

  

  Cephalopod 
  and 
  gastropod 
  sections 
  were 
  also 
  observed 
  in 
  a 
  small 
  

   quarry 
  on 
  the 
  roadside 
  at 
  the 
  west 
  foot 
  of 
  Louse 
  hill. 
  

  

  