88  BIBLIOGKAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Darton  (Nelson  H.)  and  O'Harra  (C.  C.). 
1.  Aladdin  folio,  Wyoming-South  Dakota-Montana. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  128,  1905. 
Describes  the  geography,  the  occurrence,  character,  and  relations  of  Cambrian,  Ordovician, 
Carboniferous,  Triassic(?),  Jurassic,  Cretaceous,  Tertiary,  and  Quaternary  formations  and 
of  igneous  rocks,  the  geologic  history,  and  the  economic  products. 
Darton  (Nelson  H.)  and  Smith  (W.  S.  Tangier). 
1.  Edgemont  folio,  South  Dakota-Nebraska. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  108,  1904. 
Describes  the  geography,  topography,  and  drainage,  the  geologic  history  and  structure  of 
the  area,  the  occurrence,  character,  and  relations  of  Carboniferous,  Triassic,  Jurassic,  Cre- 
taceous, and  Tertiary  sedimentary  strata,  and  the  soils  and  water  resources. 
Davidson  (George). 
1.  The  glaciers  of  Alaska  that  are  shown  on  Russian  charts  or  mentioned  in  older 
narratives. 
Geog.  Soc.  of  Pac,  Trans.  &  Proc,  2d  ser.,  vol.  3,  pp.  1-98,  11  pis.  (maps),  1904. 
Davis  (C.  Abbott). 
1.  Check-list  of  the  minerals  of  Rhode  Island. 
Roger  Williams  Park  Mus.,  Providence,  R.  I.,  Bull.  no.  8,  12  pp.,  1905.  The  Apteryx,  vol.  1, 
pp.  59-71,  1905. 
Davis  (Charles  A.). 
1.  A  second  contribution  to  the  natural  history  of  marl. 
Jour.  Geol.,  vol.  9,  pp.  491-506,  1901.    Abstract:  Am.  Geol.,  vol.  27,  p.  186,  1901. 
2.  A  contribution  to  the  natural  history  of  marl. 
Mich.  Geol.  Surv.,  vol.  8,  pt.  3,  pp.  65-96,  1903. 
Discusses  sources  and  theories  of  formation,  character,  and  composition  of  marl,  and  the  r61e 
of  Chara  in  marl  formation. 
Davis  (R.  0.  E.). 
1.  Analysis  of  kunzite. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  18,  p.  29,1904. 
Davis  (William  Morris). 
1.  An  excursion  to  the  Grand  Canyon  of  the  Colorado. 
Harv.  Coll.,  Mus.  Comp.  Zool.,  Bull.,  vol.  38,  pp.  108-201,  2  pis.,  18  figs.,  1901.    Abstract:  Geol. 
Soc.  Am.,  Bull.,  vol.  12,  p.  483, 1901;  Geol.  Mag.,  new  ser.,  dec.  4,  vol.  8,  p.  324,  1901;  Science, 
new  ser.,  vol.  13,  p.  138,  1901. 
Describes  the  denudation  and  displacements  of  the  region  and  discusses  the  origin  of  the 
drainage  system. 
2.  Peneplains  of  central  France  and  Brittany. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  12,  pp.  480-487,  2  pis.,  1901. 
Discusses  the  theory  of  peneplains. 
3.  Note  on  river  terraces  of  New  England. 
Abstract:  Geol.  Soc.  Am.,  Bull.,   vol.  12,  pp.  483-485,  1  fig.,  1901. 
Discuses  the  formation  of  these  terraces. 
4.  Current  notes  on  physiography. 
Science,  new  ser.,  vol.  13,  pp.  152-153,  1901. 
Contains  notes  on  the  Dalles  of  the  Wisconsin  and  the  islands  of  southern  California. 
5.  Current  notes  on  physiography. 
Science,  new  ser.,  vol.  13,  pp.  275-276,  1901. 
Contains  abstract  of  paper  by  H.  W.  Turner  on  the  origin  of  Yosemite  Valley. 
6.  Current  notes  on  physiography. 
Science,  new  ser.,  vol.  13,  pp.  351-352,  1901. 
Contains  abstracts  of  papers  by  I.  C.  Russell  on  the  geology  of  the  Cascade  Mountains  and  by 
W.  T.  Lee  on  the  glacier  of  Mt.  Arapahoe. 
7.  Current  notes  on  physiography. 
Science,  new  ser.,  vol.  13,  pp.  395-397,  1901. 
Contains  abstract  of  paper  by  Abbe  on  the  physiography  of  Allegany  County,  Maryland. 
