﻿SEPT. 
  19, 
  1922 
  STOSE 
  AND 
  JONAS 
  : 
  LOWER 
  PALEOZOIC 
  OF 
  PENNSYLVANIA 
  363 
  

  

  Roddy 
  of 
  Millersville, 
  Pa. 
  Above 
  the 
  shale 
  is 
  a 
  variable 
  series 
  of 
  

   dark 
  banded 
  argillaceous 
  dolomite 
  that 
  weathers 
  to 
  a 
  tough, 
  buff, 
  

   ribbed, 
  argillaceous 
  rock, 
  sparingly 
  fossiliferous. 
  Some 
  beds 
  are 
  an 
  

   intimate 
  mixture 
  of 
  nodular 
  white 
  granular 
  dolomite 
  marble 
  and 
  

   dark 
  impure 
  dolomite 
  that 
  weathers 
  to 
  a 
  knotty 
  pseudo-conglomerate 
  

   of 
  white 
  marble. 
  South 
  of 
  Welsh 
  Mountain 
  the 
  Kinzers 
  formation 
  

   is 
  much 
  thinner, 
  in 
  places 
  not 
  more 
  than 
  25 
  feet 
  thick, 
  and 
  the 
  shale 
  

   horizon 
  there 
  is 
  not 
  a 
  prominent 
  feature 
  of 
  the 
  formation. 
  Although 
  

   no 
  one 
  section 
  clearly 
  exposes 
  all 
  the 
  different 
  beds 
  of 
  the 
  formation, 
  

   the 
  section 
  at 
  the 
  Kinzers 
  cut 
  is 
  so 
  nearly 
  complete 
  that 
  it 
  is 
  here 
  

   given 
  in 
  detail. 
  

  

  Partial 
  Section 
  of 
  Kinzers 
  Formation 
  in 
  Railroad 
  Cut, 
  Kinzers, 
  Pa. 
  

  

  Feet 
  

  

  Dark 
  blue 
  limestone 
  with 
  wavy 
  impure 
  partings 
  10 
  

  

  Thick-bedded 
  light 
  gray 
  dolomite 
  12 
  

  

  Dark 
  -blue 
  limestone 
  with 
  wavy 
  impure 
  partings 
  6 
  

  

  White 
  spotted 
  marble 
  with 
  wavy 
  buff 
  dolomite 
  partings 
  8 
  

  

  Blue 
  limestone 
  banded 
  with 
  slightly 
  wavy 
  siliceous 
  layers 
  10 
  

  

  Highly 
  siliceous 
  banded 
  dark 
  limestone, 
  weathering 
  to 
  skeleton 
  

  

  of 
  buff 
  siliceous 
  network 
  8 
  

  

  Impure 
  thick-bedded 
  dolomite, 
  weathering 
  to 
  dense 
  buff 
  tripoli 
  3 
  

  

  White 
  spotted 
  marble 
  with 
  even 
  buff 
  dolomite 
  banding 
  8 
  

  

  Wavy 
  banded 
  blue 
  limestone, 
  numerous 
  argillaceous 
  partings. 
  . 
  10 
  

  

  Crumbly, 
  fissile, 
  dark 
  shale, 
  weathering 
  spheroidal 
  50 
  =•= 
  

  

  Impure 
  dolomite, 
  weathering 
  to 
  buff 
  tripoli 
  and 
  containing 
  

  

  few 
  trilobite 
  fragments 
  and 
  Salter 
  ella 
  7 
  

  

  Massive 
  light 
  blue 
  dolomite 
  (Vintage) 
  — 
  

  

  132± 
  

  

  The 
  Ledger 
  dolomite, 
  which 
  overlies 
  the 
  Kinzers 
  formation, 
  is 
  a 
  

   granular 
  gray 
  to 
  white 
  dolomite, 
  generally 
  thick-bedded 
  with 
  few 
  

   bedding 
  planes. 
  Because 
  the 
  bedding 
  cannot 
  be 
  determined 
  in 
  many 
  

   of 
  its 
  exposures 
  and 
  because 
  outcrops 
  are 
  few 
  owing 
  to 
  the 
  readiness 
  

   with 
  which 
  the 
  dolomite 
  weathers 
  to 
  a 
  granular 
  red 
  clay 
  soil, 
  its 
  thick- 
  

   ness 
  cannot 
  be 
  exactly 
  determined. 
  It 
  is 
  apparently 
  about 
  1,000 
  

   feet 
  thick. 
  Although 
  fossils 
  have 
  not 
  been 
  found 
  in 
  the 
  Ledger 
  dolo- 
  

   mite, 
  it 
  together 
  with 
  the 
  underlying 
  Kinzers 
  formation 
  and 
  Vintage 
  

   dolomite 
  are 
  believed 
  to 
  be 
  the 
  equivalent 
  of 
  the 
  Tomstown 
  dolomite 
  

   of 
  Cumberland 
  County. 
  It 
  is 
  named 
  from 
  Ledger, 
  3 
  miles 
  northeast 
  

   of 
  Kinzers. 
  

  

  The 
  Elbrook 
  dolomite, 
  which 
  overlies 
  the 
  Ledger 
  dolomite 
  north 
  

   and 
  northeast 
  of 
  Lancaster, 
  is 
  an 
  impure, 
  white 
  to 
  cream-colored, 
  

   fine-grained 
  dolomite 
  marble 
  which 
  splits 
  to 
  fine 
  plates 
  and 
  leaves 
  

   on 
  weathering 
  and 
  eventually 
  breaks 
  down 
  to 
  fragments 
  of 
  soft 
  buff 
  

  

  