﻿516 
  ' 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  > 
  ' 
  

  

  intrusives 
  constituting 
  series 
  3, 
  because 
  in 
  the 
  northern 
  Adiron- 
  

   dacks, 
  as 
  noted 
  by 
  Cushing 
  it 
  occurs 
  associated 
  with 
  the 
  anor- 
  

   thosites. 
  The 
  present 
  exposure 
  is, 
  however, 
  not 
  visibly 
  connected 
  

   with 
  eruptives 
  of 
  the 
  gabbro 
  family. 
  

  

  The 
  strike 
  of 
  the 
  foliation 
  of 
  the 
  gneisses, 
  is 
  in 
  large 
  part 
  

   across 
  the 
  trend 
  of 
  the 
  topography, 
  as 
  is 
  indicated 
  by 
  the 
  signs 
  

   on 
  the 
  map. 
  East 
  and 
  west 
  strikes 
  are 
  common, 
  but 
  northerly 
  

   ones 
  are 
  not 
  lacking. 
  The 
  dips 
  are 
  so 
  irregular 
  that 
  much 
  

   crumpling 
  is 
  shown, 
  but 
  very 
  detailed 
  work 
  will 
  be 
  necessary 
  to 
  

   work 
  out 
  the 
  structure, 
  although 
  the 
  variability 
  of 
  the 
  strikes 
  

   and 
  dips 
  and 
  their 
  lack 
  of 
  connection 
  with 
  the 
  topographic 
  

   features 
  leads 
  to 
  the 
  conclusion 
  that 
  the 
  latter 
  are 
  primarily 
  due 
  

   to 
  faulting, 
  irrespective 
  of 
  rock-structure. 
  

  

  Series 
  2. 
  The 
  crystalline 
  limestones 
  were 
  met 
  at 
  only 
  two 
  

   localities 
  one 
  of 
  which 
  lies 
  a 
  short 
  distance 
  west 
  of 
  Dresden 
  

   Center 
  and 
  the 
  other 
  is 
  on 
  South 
  bay. 
  The 
  former 
  exposure 
  is 
  

   small 
  and 
  is 
  inclosed 
  in 
  gneiss 
  as 
  shown 
  in 
  section 
  GO, 
  plate 
  2. 
  

   The 
  limestone 
  is 
  much 
  mashed 
  and 
  crumpled 
  and 
  is 
  richly 
  

   charged 
  with 
  pyroxene, 
  pyrite 
  and 
  phlogopite. 
  Along 
  the 
  high- 
  

   way 
  just 
  to 
  the 
  northwest 
  of 
  South 
  bay, 
  another 
  small 
  exposure 
  

   was 
  met. 
  At 
  the 
  outlet 
  of 
  Long 
  pond, 
  pyritous 
  rocks 
  were 
  

   found 
  along 
  the 
  highway 
  that 
  resembled 
  the 
  usual 
  associates 
  of 
  

   the 
  crystalline 
  limestone 
  but 
  none 
  of 
  the 
  latter 
  was 
  seen. 
  

  

  Series 
  3. 
  Six 
  exposures 
  of 
  basic 
  gabbros 
  were 
  noted 
  in 
  all, 
  

   and 
  several 
  dikes 
  in 
  addition 
  that 
  probably 
  belong 
  with 
  them. 
  

   At 
  the 
  head 
  of 
  South 
  bay 
  gabbro 
  appears 
  in 
  the 
  foot 
  of 
  

   Mt 
  Diameter. 
  Again 
  it 
  is 
  found 
  along 
  the 
  highway 
  a 
  mile 
  and 
  a 
  

   half 
  to 
  the 
  northeast 
  of 
  the 
  last. 
  Two 
  miles 
  further 
  another 
  ex- 
  

   posure 
  is 
  seen 
  at 
  no. 
  TO. 
  Just 
  north 
  of 
  Dresden 
  Station 
  is 
  a 
  

   large 
  intrusion, 
  no. 
  10 
  and 
  21, 
  and 
  to 
  the 
  southeast 
  at 
  3? 
  is 
  

   another. 
  In 
  the 
  northwest 
  corner 
  are 
  two, 
  one 
  at 
  18 
  on 
  the 
  main- 
  

   land, 
  and 
  one, 
  103 
  on 
  Odell 
  island 
  in 
  Lake 
  George. 
  All 
  these 
  are 
  

   dark, 
  basic 
  rocks, 
  which 
  exhibit 
  as 
  a 
  rule 
  the 
  effects 
  of 
  intense 
  

   compression. 
  They 
  form 
  irregular 
  intrusions 
  and 
  dikes 
  in 
  the 
  

   gneiss. 
  

  

  