﻿Geology. 
  85 
  

  

  II. 
  Geology. 
  

  

  1. 
  A 
  preliminary 
  paper 
  on 
  the 
  origin 
  and 
  classification 
  of 
  

   intra 
  for 
  motional 
  conglomerates 
  and 
  breccias 
  / 
  by 
  Richard 
  M. 
  

   Field. 
  Ottawa 
  Nat.,' 
  Vol. 
  XXX, 
  1916, 
  23 
  pages.— 
  An 
  interest- 
  

   ing 
  paper 
  explaining 
  the 
  origin 
  of 
  several 
  kinds 
  of 
  intraforma- 
  

   tional 
  conglomerates. 
  The 
  author 
  also 
  defines 
  conglomerates, 
  

   glomerates, 
  tectibreccias, 
  and 
  bioglomerates. 
  Phenoclasts 
  are 
  

   defined 
  as 
  the 
  fragments 
  and 
  rocks 
  of 
  which 
  the 
  foregoing 
  are 
  

   composed. 
  " 
  Intraformational 
  conglomerates 
  and 
  breccias 
  seen 
  

   at 
  Chambersburg, 
  Bellefonte 
  and 
  Tyrone, 
  Pennsylvania, 
  are 
  of 
  

   extremely 
  shallow 
  water 
  origin 
  ; 
  in 
  fact, 
  their 
  formation 
  postu- 
  

   lates 
  an 
  emergence 
  from 
  the 
  sea 
  such 
  as 
  is 
  common 
  under 
  tidal 
  

   action. 
  . 
  . 
  Mud-cracked 
  beds 
  and 
  intraformational 
  breccias 
  are 
  in 
  

   certain 
  cases 
  one 
  and 
  the 
  same 
  thing." 
  c. 
  s. 
  

  

  2. 
  Florida 
  Geological 
  Survey, 
  Eighth 
  Annual 
  Report 
  / 
  E. 
  H. 
  

   Sellards, 
  State 
  Geologist. 
  Pp. 
  168, 
  pis. 
  31, 
  text 
  figs. 
  14, 
  1916. 
  — 
  

   Besides 
  the 
  administrative 
  report 
  and 
  an 
  account 
  of 
  the 
  mineral 
  

   industries 
  of 
  Florida 
  during 
  1915, 
  this 
  volume 
  has 
  three 
  memoirs 
  

   treating 
  of 
  Cenozoic 
  vertebrates. 
  O. 
  P. 
  Hay 
  describes 
  twenty- 
  

   two 
  species, 
  of 
  which 
  nineteen 
  are 
  turtles 
  ; 
  E. 
  H. 
  Sellards 
  describes 
  

   a 
  new 
  Miocene 
  fauna 
  of 
  five 
  species, 
  and 
  four 
  vertebrates 
  from 
  

   the 
  Pliocene, 
  and 
  discusses 
  the 
  Pleistocene 
  vertebrates 
  from 
  the 
  

   state. 
  He 
  also 
  presents 
  a 
  bibliography 
  of 
  the 
  literature 
  treating 
  

   of 
  Floridian 
  fossil 
  vertebrates. 
  The 
  last 
  paper, 
  also 
  by 
  the 
  state 
  

   geologist, 
  describes 
  in 
  greater 
  detail 
  the 
  human 
  remains 
  and 
  asso- 
  

   ciated 
  fossils 
  from 
  the 
  Pleistocene 
  of 
  Florida 
  first 
  announced 
  in 
  

   this 
  Journal 
  last 
  July. 
  c. 
  s. 
  

  

  3. 
  A 
  study 
  of 
  the 
  Morrison 
  formation 
  ; 
  by 
  Charles 
  Craig 
  

   Mook. 
  Ann. 
  N. 
  Y. 
  Acad. 
  Sci., 
  Vol. 
  XXVII, 
  1916, 
  pp. 
  39-191, 
  

   pi. 
  6. 
  — 
  The 
  Morrison 
  formation 
  originally 
  " 
  had 
  an 
  extremely 
  

   wide 
  distribution, 
  which 
  may 
  have 
  amounted 
  to 
  four 
  or 
  five 
  

   hundred 
  thousand 
  square 
  miles," 
  and 
  is 
  celebrated 
  for 
  its 
  many 
  

   and 
  striking 
  dinosaurs, 
  among 
  them 
  the 
  largest 
  of 
  all 
  land 
  ani- 
  

   mals. 
  The 
  author 
  here 
  brings 
  together 
  our 
  knowledge 
  of 
  the 
  

   Morrison 
  deposits 
  and 
  their 
  distribution 
  east 
  of 
  the 
  Rocky 
  

   Mountains, 
  and 
  seeks 
  to 
  determine 
  whether 
  they 
  are 
  of 
  Jurassic 
  

   or 
  Comanchian 
  age. 
  His 
  conclusions 
  are 
  as 
  follows 
  : 
  " 
  It 
  appears, 
  

   then, 
  that 
  the 
  Morrison 
  commenced 
  as 
  a 
  continental 
  deposit 
  in 
  

   the 
  western 
  areas 
  of 
  its 
  occurrence 
  in 
  early 
  Comanchean 
  time 
  (or 
  

   possibly 
  latest 
  Jurassic), 
  and 
  that 
  it 
  spread 
  outward 
  as 
  it 
  was 
  

   built 
  up, 
  the 
  uppermost 
  and 
  easternmost 
  beds 
  being 
  laid 
  down 
  in 
  

   [later] 
  Comanchean 
  time 
  ... 
  If 
  the 
  above 
  interpretation 
  of 
  the 
  

   Morrison 
  be 
  anything 
  like 
  the 
  truth, 
  it 
  seems 
  probable 
  that 
  the 
  

   Morrison 
  merged 
  into 
  the 
  marine 
  [Comanchian] 
  deposits 
  in 
  the 
  

   southeastern 
  areas, 
  such 
  as 
  Texas, 
  and 
  that 
  the 
  Morrison 
  in 
  its 
  

   southeastern 
  and 
  eastern 
  areas 
  consisted 
  of 
  true 
  delta 
  deposits 
  " 
  

   (1/2). 
  c. 
  s. 
  

  

  4. 
  Notes 
  on 
  the 
  geology 
  of 
  Nelson 
  and 
  Hayes 
  Rivers 
  ; 
  by 
  J. 
  

   B. 
  Tyrrell. 
  Trans. 
  Roy. 
  Soc. 
  Canada, 
  Ser. 
  Ill, 
  Vol. 
  X, 
  1916, 
  

   pp. 
  1-27, 
  pis. 
  1-5, 
  2 
  text 
  figs.— 
  An 
  interesting 
  address, 
  particu- 
  

  

  