﻿222 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  grayish 
  sandstone 
  occurs 
  alternating 
  with 
  smooth, 
  greenish 
  shale 
  

   (M 
  4 
  ). 
  On 
  the 
  highway 
  just 
  east 
  of 
  the 
  old 
  " 
  state 
  road 
  " 
  at 
  the 
  

   Brown 
  farm 
  are 
  red 
  and 
  greenish 
  shales 
  (M 
  5 
  ) 
  at 
  an 
  elevation 
  of 
  

   1020 
  feet 
  above 
  the 
  river. 
  The 
  difference 
  in 
  altitude 
  between 
  

   these 
  shales 
  and 
  the 
  reds 
  at 
  LXXVN 
  1 
  , 
  on 
  the 
  hill 
  to 
  the 
  southwest, 
  

   is 
  140 
  feet, 
  but 
  the 
  stratigraphic 
  difference 
  is 
  much 
  less 
  on 
  account 
  

   of 
  the 
  southerly 
  dip. 
  These 
  shales 
  which 
  are 
  the 
  first 
  reds 
  seen 
  

   on 
  this 
  slope 
  of 
  the 
  hill 
  were 
  regarded 
  as 
  marking 
  the 
  base 
  of 
  the 
  

   Oneonta 
  formation 
  and 
  are 
  so 
  represented 
  on 
  the 
  map. 
  One 
  and 
  

   one 
  half 
  miles 
  to 
  the 
  northeast 
  are 
  the 
  red 
  shales 
  of 
  XXIX 
  M 
  8 
  

   at 
  1250 
  feet 
  above 
  the 
  river, 
  and 
  if 
  XXIX 
  M 
  8 
  and 
  LXXV 
  M 
  5 
  are 
  

   in 
  the 
  same 
  horizon 
  then 
  there 
  is 
  a 
  dip 
  of 
  150 
  feet 
  a 
  mile 
  to 
  the 
  

   southwest. 
  

  

  At 
  the 
  top 
  of 
  the 
  divide 
  three 
  quarters 
  of 
  a 
  mile 
  west 
  of 
  

   Mackey's 
  Corners 
  are- 
  coarse 
  grained, 
  greenish 
  sandstones 
  asso- 
  

   ciated 
  with 
  red 
  ones. 
  This 
  locality 
  is 
  approximately 
  330 
  feet 
  

   higher 
  than 
  the 
  first 
  reds 
  at 
  M 
  5 
  , 
  or 
  some 
  1350 
  feet 
  above 
  the 
  level 
  

   of 
  the 
  Schoharie 
  river. 
  The 
  country 
  then 
  descends 
  to 
  the 
  east 
  

   through 
  Mackey's 
  Corners 
  to 
  the 
  head 
  of 
  the 
  eastern 
  fork 
  of 
  the 
  

   Plattenkill 
  or 
  Flat 
  creek 
  at 
  the 
  foot 
  of 
  Leonard's 
  hill. 
  Plenty 
  

   of 
  bright 
  red 
  shales 
  occur 
  here 
  (Mp) 
  as 
  well 
  as 
  along 
  the 
  highway 
  

   toward 
  Broome 
  Center. 
  According 
  to 
  the 
  barometric 
  readings 
  

   these 
  shales 
  are 
  195 
  feet 
  above 
  the 
  lowest 
  reds 
  at 
  M 
  5 
  or 
  1215 
  feet 
  

   above 
  the 
  Schoharie 
  river; 
  while 
  from 
  the 
  creek 
  to 
  the 
  top 
  of 
  the 
  

   hill 
  is 
  600 
  feet. 
  This 
  makes 
  the 
  top 
  of 
  Leonard 
  hill 
  at 
  least 
  1815 
  

   feet 
  above 
  the 
  Schoharie 
  river 
  at 
  North 
  Blenheim. 
  The 
  altitude 
  

   of 
  the 
  North 
  Blenheim 
  bridge, 
  according 
  to 
  Guyot, 
  being 
  S00 
  feet 
  

   A. 
  T. 
  this 
  section 
  makes 
  the 
  top 
  of 
  Leonard 
  hill 
  2615 
  feet 
  A. 
  T. 
  

   The 
  above 
  section 
  is 
  a 
  fairly 
  accurate 
  one 
  for 
  Guyot 
  determined 
  

   the 
  elevation 
  of 
  Leonard 
  hill 
  by 
  means 
  of 
  the 
  mercurial 
  barometer 
  

   to 
  be 
  2649 
  feet 
  A. 
  T. 
  a 
  , 
  which 
  is 
  only 
  34 
  feet 
  more 
  than 
  that 
  for 
  the 
  

   section 
  just 
  described. 
  The 
  slope 
  of 
  the 
  hill 
  is 
  partly 
  covered, 
  

   but 
  the 
  exposures 
  of 
  rocks 
  show 
  an 
  alternation 
  of 
  greenish 
  gray, 
  

   coarse 
  grained 
  sandstones 
  with 
  red 
  shales 
  and 
  sandstones 
  from 
  

  

  Amer. 
  jour, 
  science, 
  3d 
  ser. 
  19:450. 
  See 
  p. 
  449 
  for 
  elevation 
  of 
  North 
  Blenheim. 
  

  

  