﻿160 
  Scientific 
  Intelligence. 
  

  

  Arkansas 
  River 
  valley, 
  often 
  near 
  the 
  highest 
  points 
  in 
  the 
  sur- 
  

   face 
  topography, 
  and 
  were 
  interpreted 
  as 
  hollows 
  scooped 
  out 
  by 
  

   winds 
  blowing 
  in 
  one 
  direction 
  persistently, 
  during 
  dry 
  weather 
  

   and 
  filled 
  by 
  rains, 
  becoming 
  lakes 
  and 
  finally 
  drying 
  up 
  to 
  mere 
  

   hollows 
  in 
  the 
  surface. 
  The 
  name 
  " 
  Tepee 
  Buttes 
  " 
  is 
  given 
  to 
  

   conical 
  hills 
  left 
  after 
  surface 
  degradation 
  of 
  the 
  approximately 
  

   horizontal 
  Cretaceous 
  strata, 
  composed 
  of 
  central 
  cylindrical 
  cones 
  

   of 
  limestone 
  chiefly 
  made 
  up 
  of 
  fossil 
  shells 
  in 
  the 
  midst 
  of 
  the 
  

   soft, 
  thinly 
  bedded 
  shales. 
  N. 
  S. 
  Shaler 
  read 
  a 
  paper 
  On 
  certain 
  

   features 
  in 
  the 
  jointing 
  and 
  veining 
  of 
  the 
  Lower 
  Silurian 
  lime- 
  

   stone 
  near 
  Cumberland 
  Gap, 
  Tenn., 
  — 
  gash 
  veins, 
  in 
  dense 
  dolo- 
  

   mitic 
  limestone, 
  l 
  mm 
  . 
  in 
  diameter 
  and 
  an 
  inch 
  to 
  a 
  few 
  inches 
  in 
  

   length, 
  filled 
  by 
  calcite, 
  but 
  the 
  rock 
  strata 
  not 
  faulted, 
  folded 
  or 
  

   displaced. 
  H. 
  S. 
  Williams, 
  read 
  a 
  paper 
  on 
  Devonian 
  fossils 
  in 
  

   Carboniferous 
  strata 
  which 
  appears 
  in 
  full 
  in 
  the 
  present 
  number 
  

   of 
  this 
  Journal. 
  The 
  large 
  number 
  of 
  papers 
  on 
  Petrography 
  

   and 
  allied 
  subjects 
  determined 
  the 
  formation 
  of 
  a 
  petrographical 
  

   section 
  which 
  held 
  a 
  separate 
  meeting 
  on 
  Friday. 
  

  

  In 
  addition 
  to 
  the 
  papers 
  above 
  referred 
  to 
  the 
  following 
  were 
  

   presented, 
  some 
  of 
  them, 
  in 
  the 
  absence 
  of 
  the 
  authors, 
  being 
  read 
  

   by 
  title 
  only. 
  

  

  H. 
  P. 
  Cushing— 
  The 
  faults 
  of 
  Chazy 
  Township, 
  Clinton 
  Co., 
  N. 
  Y. 
  

  

  W. 
  J. 
  McGee 
  — 
  Remarks 
  on 
  the 
  geology 
  of 
  Arizona 
  and 
  Sonora. 
  

  

  Waiter 
  H. 
  Weed 
  and 
  Louis 
  V. 
  Pirsson 
  — 
  Geology 
  of 
  the 
  Highwood 
  Moun- 
  

   tains, 
  Montana. 
  

  

  Charles 
  R. 
  Keyes 
  — 
  Genesis 
  and 
  structure 
  of 
  the 
  Ozark 
  uplift. 
  

  

  J. 
  W. 
  Spencer 
  — 
  The 
  geographical 
  evolution 
  of 
  Cuba. 
  

  

  T. 
  C. 
  Chamberlin 
  — 
  Notes 
  on 
  the 
  glaciation 
  of 
  Newfoundland. 
  

  

  C. 
  W. 
  Hall 
  — 
  The 
  Pre-Cambrian 
  floor 
  in 
  the 
  Northwestern 
  states. 
  

  

  J. 
  P. 
  Kemp 
  — 
  The 
  crystalline 
  limestones, 
  ophiolites 
  and 
  associated 
  schists 
  of 
  the 
  

   eastern 
  Adirondacks. 
  

  

  David 
  White 
  — 
  The 
  Pottsville 
  series 
  along 
  New 
  River, 
  West 
  Virginia. 
  

  

  William 
  B. 
  Clark 
  — 
  The 
  Cretaceous 
  deposits 
  of 
  the 
  Northern 
  half 
  of 
  the 
  

   Atlantic 
  coastal 
  plain. 
  The 
  marginal 
  development 
  of 
  the 
  Miocene 
  in 
  eastern 
  New 
  

   Jersey. 
  

  

  G. 
  K. 
  Gilbert 
  — 
  Stratigraphic 
  measurement 
  of 
  Cretaceous 
  time. 
  

  

  E. 
  T. 
  Dumble 
  — 
  Notes 
  on 
  the 
  Cretaceous 
  of 
  Western 
  Texas 
  and 
  Coahuila, 
  

   Mexico. 
  

  

  N. 
  H. 
  Daeton 
  — 
  Sedimentary 
  geology 
  of 
  the 
  Baltimore 
  region. 
  

  

  R. 
  P. 
  Whitfield 
  — 
  On 
  new 
  forms 
  of 
  marine 
  algse 
  from 
  the 
  Trenton 
  limestone, 
  

   with 
  observations 
  on 
  Buthograplus 
  laxus, 
  Hall. 
  

  

  W. 
  S. 
  Bayley 
  — 
  Spherulitic 
  volcanics 
  at 
  North 
  Haven, 
  Maine. 
  The 
  peripheral 
  

   phases 
  of 
  the 
  great 
  gabbro 
  mass 
  of 
  northeastern 
  Minnesota. 
  The 
  contact 
  phenom- 
  

   ena 
  at 
  Pigeon 
  Point, 
  Minnesota. 
  (Simply 
  exhibition 
  of 
  specimens.) 
  

  

  Alfred 
  C. 
  Lane 
  — 
  The 
  relation 
  of 
  grain 
  to 
  distance 
  from 
  margin 
  in 
  certain 
  rocks. 
  

   Crystallized 
  slags 
  from 
  copper-smelting. 
  

  

  Robert 
  Bell 
  — 
  On 
  the 
  honeycombed 
  limestones 
  in 
  the 
  bottom 
  of 
  Lake 
  Huron. 
  

  

  Leon 
  S. 
  Griswold 
  — 
  On 
  the 
  nomenclature 
  of 
  the 
  fine-grained 
  siliceous 
  rocks. 
  

  

  Alfred 
  B. 
  Barlow 
  — 
  On 
  some 
  dykes 
  containing 
  " 
  Huronite." 
  

  

  Waldemar 
  Lindgren 
  — 
  The 
  characteristic 
  feature 
  of 
  the 
  California 
  gold 
  quartz 
  

   veins. 
  

  

  Samuel 
  Weidman 
  — 
  On 
  the 
  quartz-keratophyre 
  and 
  its 
  associated 
  rocks 
  of 
  the 
  

   Baraboo 
  Bluffs, 
  Wisconsin. 
  

  

  Edward 
  B. 
  Mathews 
  — 
  The 
  granites 
  of 
  Pike's 
  Peak, 
  Colorado. 
  

  

  N. 
  H. 
  Barton 
  and 
  J. 
  P. 
  Kemp 
  — 
  A 
  new 
  intrusive 
  rock 
  near 
  Syracuse, 
  New 
  

   York. 
  

  

  