﻿1*34 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  nature 
  of 
  the 
  Black 
  river 
  limestone 
  escarpment, 
  that 
  it 
  is 
  probably 
  

   a 
  fault 
  contact. 
  The 
  streams 
  cut 
  the 
  crystallines, 
  or 
  ancient 
  valleys 
  

   eroded 
  in 
  them, 
  tliat 
  have 
  been 
  deeply 
  filled 
  with 
  sand. 
  The 
  con- 
  

   tinuous 
  section 
  which 
  is 
  desired 
  should 
  be 
  sought 
  on 
  tributaries 
  

   entering 
  Black 
  river 
  fi'om 
  the 
  west. 
  As 
  so 
  far 
  observed 
  the 
  Boon- 
  

   ville 
  section 
  is 
  the 
  nearest 
  approach 
  to 
  such 
  an 
  ideal 
  section, 
  but 
  

   that 
  is 
  far 
  from 
  satisfactory. 
  

  

  In 
  addition 
  to 
  the 
  work 
  above 
  described, 
  the 
  director 
  of 
  tlie 
  state 
  

   museum 
  desired 
  the 
  writer 
  to 
  make, 
  if 
  possible, 
  a 
  section 
  in 
  the 
  

   vicinity 
  of 
  Frankfort 
  Hill, 
  Herkimer 
  county 
  from 
  the 
  Ordovician 
  

   through 
  the 
  Lower 
  Helderberg, 
  and 
  to 
  collect 
  rocks 
  and 
  fossils. 
  

  

  The 
  area 
  covered 
  to 
  secure 
  the 
  following 
  results 
  embraces 
  the 
  towns 
  

   of 
  Frankfort, 
  Center, 
  Frankfort 
  Hill, 
  Chadwick 
  and 
  Sauquoit. 
  

  

  Type 
  section 
  

  

  137 
  A 
  ; 
  — 
  The 
  type 
  section 
  of 
  the 
  Frankfort 
  slates 
  (Yanuxem 
  '40, 
  p. 
  

   372) 
  is 
  on 
  Moyer 
  creek, 
  Frankfort. 
  The 
  creek 
  is 
  called 
  

   ''Frankfort 
  creek" 
  in 
  the 
  report 
  cited, 
  and 
  is 
  misspelled 
  

   " 
  Myers 
  creek 
  " 
  in 
  Yanuxem's 
  report 
  ('42, 
  p. 
  63, 
  etc.) 
  

   The 
  strata 
  beneath 
  the 
  slates 
  are 
  not 
  shown. 
  

  

  The 
  section 
  is 
  as 
  follows 
  : 
  

  

  137 
  A 
  J 
  ; 
  — 
  First 
  exposure 
  at 
  the 
  bridge 
  on 
  the 
  farm 
  road 
  which 
  leaves 
  

   the 
  road 
  from 
  Frankfort 
  to 
  Sauquoit, 
  1 
  J 
  miles 
  west 
  of 
  Frank- 
  

   fort. 
  (Fig. 
  6) 
  (No 
  outcrops 
  occur 
  between 
  this 
  point 
  and 
  

   the 
  Mohawk.) 
  Black 
  thin-bedded 
  shales 
  with 
  conchoidal 
  fracture 
  

   as 
  if 
  under 
  stress. 
  Dip 
  3'' 
  to 
  4°, 
  S 
  00° 
  W. 
  Fault 
  planes 
  

   N 
  40° 
  W 
  and 
  N 
  25° 
  E. 
  At 
  17 
  feet 
  above 
  the 
  base 
  a 
  thin 
  

   layer 
  contains 
  Graptolites 
  and 
  a 
  small 
  species 
  of 
  Orthoceras. 
  

   Total 
  thickness 
  of 
  the 
  exposure, 
  20 
  feet 
  

  

  A 
  2; 
  — 
  Gray 
  sandstone, 
  weathering 
  red, 
  overlying 
  A 
  1 
  in 
  the 
  

   small 
  brook 
  which 
  enters 
  the 
  creek 
  near 
  the 
  bridge 
  above 
  

   mentioned 
  6 
  feet 
  

  

  Along 
  Moyer 
  creek 
  gorge 
  for 
  nearly 
  three 
  miles 
  the 
  same 
  alter- 
  

   nating 
  series 
  of 
  shales 
  and 
  thin 
  bedded 
  sandstones 
  is 
  shown 
  in 
  cliffs 
  

   at 
  least 
  90 
  feet 
  in 
  height; 
  so 
  that 
  the 
  total 
  thickness 
  of 
  the 
  Frank- 
  

  

  