﻿G. 
  E. 
  Wieland 
  — 
  On 
  Liassic 
  Floras. 
  259 
  

  

  40. 
  A 
  fine-grained 
  sandstone 
  _ 
  M. 
  2 
  

  

  41. 
  Argillaceous 
  to 
  arenaceous 
  bed 
  without 
  ledges 
  M. 
  16 
  

  

  42.* 
  Sandstones, 
  with 
  frequent 
  gradations 
  into 
  shaly 
  and 
  

  

  concretionary 
  structure. 
  Thin 
  carbonaceous 
  bands 
  are 
  

   present. 
  Many 
  plants 
  above. 
  The 
  large-leafed 
  Wil- 
  

   liamsonias 
  and 
  large 
  buds, 
  stems 
  and 
  Cycadolepis 
  are 
  

   first 
  met 
  with 
  in 
  this 
  important 
  horizon. 
  [Cf. 
  Plates 
  

  

  XXI-XXVI] 
  M. 
  19 
  

  

  43.* 
  More 
  or 
  less 
  straticulate 
  sandy 
  and 
  shaly 
  layers 
  with 
  

   plants. 
  [The 
  Ptilophyllums 
  occur 
  here 
  in 
  great 
  num- 
  

   ber. 
  Cf. 
  Plate 
  I, 
  etc.] 
  M. 
  3 
  

  

  44. 
  Somewhat 
  gritty 
  sandstone 
  M. 
  2 
  

  

  45.* 
  Nodular 
  shales, 
  with 
  more 
  or 
  less 
  imperfectly 
  conserved 
  

  

  plants 
  M. 
  2 
  

  

  46. 
  Arenaceous 
  shales 
  or 
  clays 
  without 
  sharp 
  ledges 
  M. 
  5 
  

  

  47. 
  Gritty 
  to 
  conglomeratic 
  ledge 
  stretching 
  across 
  bed 
  of 
  

   barranca 
  M. 
  2 
  

  

  4b.* 
  Arenaceous 
  shales 
  not 
  forming 
  sharp 
  ledges. 
  Many 
  

   cycads 
  below. 
  Mostly 
  the 
  smaller 
  Ptilophyllum. 
  Cf. 
  

   Plate 
  VII 
  _ 
  -.. 
  M. 
  18 
  

  

  49.* 
  Shales 
  with 
  slightly 
  straticulate 
  zones 
  not 
  forming 
  

  

  sharp 
  ledges. 
  Plants 
  indistinct 
  ._ 
  M. 
  4 
  

  

  50.* 
  Gritty 
  to 
  slightly 
  conglomeratic 
  material 
  softer 
  above 
  

  

  and 
  probably 
  bearing 
  good 
  plants 
  in 
  some 
  situations 
  .. 
  M. 
  2 
  

  

  51.* 
  Sandstone 
  ledge 
  with 
  indistinct 
  imprints 
  of 
  logs 
  in 
  

  

  lower 
  portion 
  M. 
  5*5 
  

  

  52.* 
  Straticulate 
  arenaceous 
  shales 
  ending 
  in 
  a 
  more 
  argilla- 
  

   ceous 
  layer 
  with 
  well-conserved 
  plants 
  M. 
  13 
  

  

  53.* 
  Sandy 
  lenses 
  and 
  arenaceous 
  shales 
  with 
  thin 
  bands 
  of 
  

   shale 
  containing 
  plants. 
  Carbonaceous 
  seams 
  near 
  

   middle, 
  but 
  no 
  coal 
  and 
  no 
  distinct 
  ledges 
  M. 
  21 
  

  

  54.* 
  Arenaceous 
  and 
  clayey 
  materials 
  with 
  a 
  well-defined 
  

   clay 
  stratum 
  and 
  finely 
  conserved 
  plants 
  near 
  middle. 
  

   Forms 
  a 
  ledge 
  on 
  left 
  bank 
  of 
  barranca 
  only, 
  the 
  right 
  

   bank 
  being 
  quite 
  smooth 
  .. 
  M. 
  8 
  

  

  55. 
  Alternate 
  bands 
  of 
  shaly 
  and 
  arenaceous 
  materials, 
  

   some 
  carbonaceous 
  shale 
  below 
  but 
  no 
  distinct 
  plants. 
  M. 
  14-5 
  

  

  56. 
  Sandstone 
  containing 
  one 
  shale 
  stratum 
  one 
  third 
  of 
  a 
  

   meter 
  thick, 
  and 
  ending 
  in 
  nodular 
  to 
  straticulate 
  

   sandrock 
  . 
  _ 
  M. 
  3*5 
  

  

  57. 
  Grits, 
  conglomerates, 
  or 
  sandstones 
  mostly 
  fine-grained 
  

   and 
  massive 
  with 
  little 
  argillaceous 
  lamination. 
  Some- 
  

   times 
  the 
  sandstones 
  show 
  flow 
  and 
  plunge 
  structure. 
  

   In 
  upper 
  portions 
  indistinct 
  stems 
  of 
  plants. 
  This 
  

   series 
  forms 
  a 
  prominent 
  ridge 
  M. 
  29 
  

  

  58. 
  Soft 
  sandstones 
  not 
  forming 
  ledges. 
  Produces 
  surface 
  

  

  soil 
  nearly 
  free 
  from 
  clay 
  M. 
  1 
  7 
  

  

  59. 
  Sandstones, 
  more 
  or 
  less 
  micaceous 
  to 
  clayey 
  and 
  

   laminated 
  above 
  _ 
  M. 
  3 
  5 
  

  

  