﻿Geology. 
  449 
  

  

  detail. 
  The 
  general 
  work 
  and 
  organization 
  of 
  the 
  Survey 
  is 
  

   practically 
  as 
  it 
  was 
  in 
  the 
  previous 
  year. 
  Attention 
  is 
  called 
  

   to 
  the 
  need 
  for 
  a 
  new 
  building 
  for 
  the 
  Survey 
  and 
  better 
  provi- 
  

   sions 
  for 
  preserving 
  the 
  collections, 
  both 
  of 
  the 
  Survey 
  and 
  of 
  

   the 
  new 
  Division 
  of 
  Mines 
  and 
  Mining. 
  The 
  following 
  distribution 
  

   of 
  the 
  work 
  in 
  Geology 
  will 
  indicate 
  the 
  extent 
  of 
  the 
  operations 
  

   of 
  the 
  Survey 
  : 
  

  

  In 
  the 
  New 
  England 
  region, 
  the 
  Shaler 
  party 
  was 
  engaged 
  in 
  

   studying 
  the 
  geology 
  of 
  Cape 
  Cod 
  and 
  Narragansett 
  Bay 
  dis- 
  

   tricts 
  ; 
  the 
  Emerson 
  party 
  was 
  engaged 
  on 
  the 
  Worcester, 
  Marl- 
  

   boro, 
  and 
  Blackstone 
  quadrangles 
  ; 
  the 
  Dale 
  party 
  on 
  the 
  Cohoes 
  

   and 
  Hoosick 
  quadrangles 
  of 
  New 
  York, 
  and 
  the 
  Bennington 
  

   quadrangle 
  of 
  Vermont 
  ; 
  the 
  Wolff 
  party 
  completed 
  the 
  surveys 
  

   of 
  the 
  Archean 
  rocks 
  on 
  the 
  northeastern 
  portion 
  of 
  the 
  Ben- 
  

   nington 
  quadrangle. 
  Professor 
  Wolff 
  studied 
  also 
  the 
  under- 
  

   ground 
  workings 
  of 
  the 
  zinc 
  mines 
  at 
  Franklin 
  Furnace. 
  The 
  

   Williams 
  party 
  continued 
  the 
  study 
  of 
  the 
  Paleozoic 
  rocks 
  of 
  

   Maine, 
  and 
  certain 
  igneous 
  problems 
  of 
  the 
  same 
  region 
  ; 
  the 
  

   Kemp 
  party 
  continued 
  the 
  survey 
  of 
  the 
  Lake 
  Placid 
  and 
  Ausa- 
  

   ble 
  quadrangles 
  of 
  New 
  York; 
  the 
  Gilbert 
  party 
  continued 
  sur- 
  

   veys 
  in 
  northwestern 
  New 
  York, 
  covering 
  parts 
  of 
  Niagara 
  

   County. 
  

  

  In 
  the 
  Appalachian 
  region, 
  the 
  parties 
  at 
  work 
  were 
  White, 
  

   mapping 
  the 
  Pottsville 
  series 
  and 
  Lykens 
  coals, 
  and 
  other 
  areas 
  

   about 
  Broad 
  Mountain: 
  Campbell, 
  the 
  Oceana 
  (West 
  Virginia) 
  

   quadrangle; 
  Hayes, 
  at 
  first 
  in 
  Nicaragua 
  and 
  Costa 
  Rica, 
  under 
  

   detail 
  by 
  the 
  Secretary 
  of 
  the 
  Interior, 
  and 
  after 
  June 
  3d 
  in 
  the 
  

   southern 
  Appalachians 
  ; 
  Bascom, 
  mapping 
  the 
  crystalline 
  rocks 
  

   in 
  the 
  Philadelphia 
  district; 
  Keith, 
  in 
  the 
  Cranberry 
  and 
  Chero- 
  

   kee 
  districts 
  of 
  Tennessee 
  and 
  North 
  Carolina; 
  Van 
  Hise, 
  on 
  

   Mount 
  Guyot 
  quadrangle 
  of 
  Tennessee. 
  

  

  Clarke 
  continued 
  investigations 
  of 
  the 
  Cretaceous 
  and 
  Tertiary 
  

   in 
  eastern 
  and 
  southern 
  Maryland, 
  and 
  Darton 
  in 
  the 
  District 
  of 
  

   Columbia, 
  Maryland, 
  and 
  Virginia, 
  in 
  the 
  Atlantic 
  coastal 
  plain 
  

   region. 
  

  

  The 
  Interior 
  or 
  Mississippi 
  region 
  was 
  explored 
  by 
  Van 
  Hise, 
  

   in 
  the 
  iron-bearing 
  districts 
  of 
  Lake 
  Superior 
  and 
  Vermilion 
  ; 
  by 
  

   Darton 
  in 
  South 
  Dakota 
  and 
  Nebraska, 
  in 
  the 
  Black 
  Hills 
  region; 
  

   R. 
  T. 
  Hill 
  in 
  Texas, 
  working 
  on 
  the 
  physical 
  geography 
  prob- 
  

   lems 
  ; 
  Vaughan 
  also 
  in 
  Texas. 
  The 
  Taff 
  party 
  were 
  at 
  work 
  in 
  

   the 
  Indian 
  Territory, 
  making 
  surveys 
  of 
  the 
  coal 
  field 
  ; 
  Emmons 
  

   in 
  South 
  Dakota, 
  investigating 
  the 
  Black 
  Hills 
  region 
  particu- 
  

   larly, 
  where 
  an 
  almost 
  complete 
  representation 
  of 
  sedimentary 
  

   rocks 
  from 
  the 
  Algonkian 
  to 
  the 
  Tertiary 
  was 
  exploited. 
  

  

  The 
  Rocky 
  Mountain 
  region 
  was 
  explored 
  by 
  the 
  Emmons 
  

   party 
  who, 
  in 
  Colorado, 
  investigated 
  the 
  underground 
  workings 
  

   of 
  mines 
  in 
  the 
  vicinity 
  of 
  Rico. 
  Whitman 
  Cross 
  was 
  engaged 
  

   in 
  the 
  San 
  Juan 
  Mountains 
  of 
  southwestern 
  Colorado 
  ; 
  R. 
  C. 
  

   Hills 
  in 
  the 
  regions 
  of 
  the 
  Elmoro, 
  Spanish 
  Peaks, 
  and 
  Walsen- 
  

   burg 
  quadrangles 
  of 
  Colorado. 
  Weed 
  made 
  geologic 
  investiga- 
  

  

  