﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  I7 
  

  

  it. 
  In 
  two 
  old, 
  abandoned 
  quarries 
  on 
  the 
  farm 
  of 
  Mr 
  Byer, 
  near 
  

   Manchester 
  Bridge, 
  3 
  miles 
  east 
  of 
  Poughkeepsie, 
  the 
  Trenton 
  

   conglomerate, 
  so 
  well 
  displayed 
  at 
  Pleasant 
  \'alley 
  and 
  Rockdale, 
  

   was 
  found 
  filled 
  with 
  Solenopora 
  com 
  pacta 
  and 
  crinoid 
  

   stems, 
  and 
  overlain 
  by 
  hard, 
  blue, 
  medium 
  bedded 
  limestones 
  carry- 
  

   ing 
  a 
  rather 
  full 
  assemblage 
  of 
  brachiopods, 
  with 
  an 
  occasional 
  

   trilobite, 
  all 
  of 
  apparent 
  Trenton 
  affinities. 
  Southeast 
  of 
  Pough- 
  

   keepsie 
  on 
  the 
  Spackenkill 
  road, 
  on 
  the 
  farm 
  of 
  Mr 
  Ruppert, 
  in 
  a 
  

   quarry 
  being 
  worked 
  for 
  lime, 
  in 
  a 
  hard, 
  thick-bedded 
  limestone, 
  

   coils 
  resembling 
  gastropods 
  and 
  a 
  Hyolithellus 
  were 
  discovered 
  and 
  

   above 
  these 
  in 
  the 
  somewhat 
  thinner 
  beds 
  in 
  the 
  upper 
  part 
  of 
  the 
  

   quarry, 
  Lingulepis 
  pinniformis 
  and 
  a 
  trilobite 
  probably 
  

   Ptychoparia, 
  thus 
  confirming 
  the 
  occurrence 
  and 
  abundance 
  of 
  the 
  

   Potsdam 
  fauna 
  as 
  first 
  discovered 
  by 
  Dwight 
  nearer 
  Poughkeepsie, 
  

   2 
  miles 
  north 
  of 
  this 
  quarry. 
  The 
  now^ 
  known 
  localities 
  of 
  Pots- 
  

   dam 
  fossils 
  within 
  this 
  quadrangle 
  and 
  the 
  thickness 
  of 
  the 
  strata 
  

   show 
  it 
  to 
  be 
  a 
  prominently 
  developed 
  terrane. 
  

  

  Numerous 
  smaller 
  patches 
  of 
  limestone, 
  or 
  limestone 
  conglomer- 
  

   ate, 
  occurring 
  as 
  inliers 
  in 
  the 
  slates 
  to 
  the 
  east 
  of 
  Wappinger 
  creek 
  

   have 
  been 
  noted 
  and 
  mapped, 
  but 
  can 
  not 
  be 
  discussed 
  here 
  and 
  may 
  

   be 
  left 
  for 
  the 
  fuller 
  report. 
  

  

  Slates. 
  The 
  Paleozoic 
  rocks 
  of 
  this 
  quadrangle 
  present 
  a 
  com- 
  

   plicated 
  structural 
  and 
  stratigraphic 
  problem. 
  The 
  structural 
  

   features 
  and 
  many 
  details 
  can 
  not 
  be 
  more 
  than 
  alluded 
  to 
  in 
  this 
  

   report. 
  

  

  Recalling 
  the 
  faulted 
  proximity 
  which 
  Lower 
  Cambric 
  rocks 
  

   have 
  to 
  those 
  of 
  Ordovicic 
  age 
  at 
  the 
  north, 
  as 
  at 
  Bald 
  mountain, 
  

   Washington 
  co., 
  the 
  slates 
  and 
  schists 
  in 
  the 
  eastern 
  part 
  of 
  the 
  

   quadrangle 
  were 
  studied 
  for 
  such 
  relationships. 
  The 
  small 
  lime- 
  

   stone 
  inliers 
  were 
  examined 
  in 
  this 
  connection. 
  The 
  possibility 
  

   of 
  the 
  Normanskill 
  and 
  the 
  Utica 
  occurring 
  in 
  the 
  western 
  slates 
  

   was 
  considered 
  ; 
  but 
  no 
  evidence 
  of 
  any 
  of 
  these 
  was 
  secured. 
  

   Fossils 
  were 
  hard 
  to 
  find. 
  In 
  the 
  slates 
  they 
  were 
  noted 
  at 
  many 
  of 
  

   the 
  localities 
  where 
  previously 
  discovered, 
  but 
  were 
  not 
  seen 
  at 
  

   others. 
  The 
  general 
  relationships 
  suggested 
  nothing 
  older 
  than 
  the 
  

   Trenton 
  limestone 
  of 
  the 
  region. 
  Only 
  one 
  new 
  fossil 
  locality 
  was 
  

   discovered 
  in 
  the 
  slates. 
  At 
  SwartoutvillCj 
  2 
  miles 
  north 
  of 
  

   Brinckerhoil, 
  between 
  Fishkill 
  Village 
  and 
  Hopewell 
  Junction 
  in 
  

   fissile, 
  broken 
  slates, 
  along 
  a 
  fault 
  between 
  them 
  and 
  the 
  barren 
  

   northwest 
  margin 
  of 
  the 
  Fishkill 
  limestone, 
  brachiopod 
  fragments 
  

   were 
  discovered. 
  Their 
  examination 
  has 
  only 
  suggested 
  a 
  horizon 
  

   of 
  Trenton 
  or 
  later 
  age. 
  

  

  