FOR    THE    YEARS    1901-1905,   INCLUSIVE.  165 
Hilgard  (E.  W.)— Continued. 
4.  The  Grand  Gulf  formation. 
Science,  new  ser..  vol.  18,  pp.  180-182, 1903. 
Describes  lithologic  and  other  characteristics  of  the  Grand  Gulf  formation. 
5.  The  valley  of  southern  California. 
Abstract:  Jour.  Geol.,  vol.  11,  p.  96,  1903. 
6.  The  prairie  mounds  of  Louisiana. 
Science,  new  ser.,  vol.  21,  pp.  551-552,  1905. 
Discusses  the  origin  of  these  mounds. 
Hill  (Benjamin  F.). 
1.  The  Terlingua  quicksilver  deposits,  Brewster  County,  Texas. 
Texas  Univ.  Mineral  Surv.,  Bull.  no.  4,  71  pp.,  21  pis.,  10  figs.,  1902. 
Gives  a  brief  account  of  the  physiography,  geologic  structure,  and  occurrence  of  the  Creta- 
ceous and  igneous  rocks.  Describes  the  character  and  occurrence  of  the  quicksilver 
deposits  and  associated  minerals  and  discusses  the  mode  of  occurrence  of  the  ores. 
2.  The  occurrence  of  the  Texas  mercury  minerals. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  16,  pp.  251-252,  1903. 
3.  Gypsum  deposits  in  Texas. 
U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  68-73,  1  fig.,  1904. 
Describes  character,  occurrence,  and  economic  development  of  gypsum  deposits  in  Texas. 
4.  Das  Vorkommen  der  texanischen  Quecksilbermineralien. 
Zeitsch.  f.  Krystal.  u.  Min.,  Bd.  39,  2  pp.,  1904. 
Describes  the  occurrence  in  Texas  of  minerals  containing  quicksilver. 
Hill  (B.  F.),  Kemp  (J.  F.)  and. 
1.  Preliminary  report  on  the  pre-Cambrian  formations  in  parts  of  Warren,  Saratoga, 
Fulton,  and  Montgomery  counties  (New  York). 
See  Kemp  (J.  F.)  and  Hill  (B.  F.),  1. 
Hill  ( Robert  T.). 
1.  The  coast  prairie  of  Texas. 
Science,  new  ser.,  vol.  14,  pp.  326-328,  1901. 
Describes  the  evidences  of  differential  movements  in  this  region  and  its  bearing  on  the 
occurrence  of  oil. 
2.  Geographic  and  geologic  features  of  Mexico. 
Eng.  &  Mg.  Jour.,  vol.  72,  pp.  561-564,  2  figs.,  1901. 
Describes  the  physiography  and  geology  of  the  country. 
3.  Geography  and  geology  of  the  Black  and  Grand  prairies,  Texas,  with  detailed 
descriptions  of    the   Cretaceous   formations  and  special  reference  to   artesian 
waters. 
U.  S.  Geol.  Surv.,  21st  Ann.  Rept.,  pt.  7,  666  pp.,  71  pis.,  80  figs.,  1901. 
Describes  physiographic  and  drainage  features,  the  character  and  occurrence  of  Azoic,  Cam- 
brian, Ordovician,  Carboniferous,  Permo-Triassic,  and  Cretaceous  rocks,  and  the  conditions 
and  occurrence  of  artesian  waters.  The  nomenclature,  classification,  correlation,  charac- 
ter, and  occurrence  of  the  Cretaceous  rocks  are  described  in  detail,  with  numerous  sections, 
faunal  lists,  and  figures  of  characteristic  fossils  arid  typical  exposures,  and  the  geography 
and  conditions  of  deposition  prevailing  in  Cretaceous  times  are  discussed. 
4.  The  geographic  and  geologic  features  and  their  relation  to  the  mineral  products  of 
Mexico. 
Am.  Inst,  Mg.  Engrs.,  Trans.,  vol.  32,  pp.  163-178,  2  figs.,  1902. 
5.  The  Beaumont  oil  field,  with  notes  on  other  oil  fields  of  the  Texas  region. 
Franklin  Inst.,  Jour.,  vol.  154,  pp.  143-156,  2  figs.,  pp.  225-238,  263-281,  1902. 
Describes  the  occurrence  and  geologic  relations  of  the  oil-bearing  strata  of  Texas. 
6.  [Report  to  the  National  Geographic  Society  on  volcanic  disturbances  in  the  West 
Indies.] 
Nat.  Geog.  Mag.,  vol.  13,  pp.  225-267,  14  figs.,  1902. 
Contains  an  account  of  the  author's  observations  of  the  phenomena  attending  the  eruptions 
in  1902. 
