166  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Hill  (Robert  T.)— Continued. 
7.  The  upland  placers  of  La  Cienega,  Sonora,  Mexico. 
Eng.  &  Mg.  Jour.,  vol.  73,  pp.  132-134,  7  figs.,  1902. 
Describes  the  occurrence  of  the  gold  and  the  method  of  dry  washing. 
8.  The  cinnabar  deposits  of  the  Big  Bend  province  of  Texas. 
Eng.  &  Mg.  Jour.,  vol.  74,  pp.  305-307,  4  tigs.,  1902. 
Describes  the  geologic  occurrence  of  the  cinnabar  deposits  in  this  area. 
9.  The  Beaumont  oil-field,  with  notes  on  other  oil-fields  of  the  Texas  region. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp.  363-405,  2  figs.,  1903. 
Discusses  origin  and  occurrence  of  oil,  describes  geography,  occurrence,  and  character  of  sedi- 
mentary strata  of  southeastern  Texas,  the  situation,  extent,  and  production  of  different  oil- 
fields, the  discovery,  development,  geology,  and  structural  features  of  the  Beaumont  field, 
and  discusses  the  origin  of  its  oil. 
10.  The  Santa  Eulalia  district,  Mexico. 
Eng.  &  Mg.  Jour.,  vol.  76,  pp.  158-160,  illus.,  1903. 
Describes  the  general  geology  and  the  character  and  occurrence  of  the  ore  bodies. 
11.  The  ore  deposits  of  Cananea  [Mexico]. 
Eng.  &  Mg.  Jour.,  vol.  76,  p.  421,  1903. 
Gives  observations  upon  the  general  geology,  structural  features,  and  the  origin  of  the  ores. 
12.  Cananea  revisited. 
Eng.  &  Mg.  Jour.,  vol.  76,  pp.  1000-1001,  1903. 
Describes  the  geology  of  the  region,  the  occurrence  and  sequence  of  the  igneous  rocks,  the 
Assuring  and  faulting,  and  the  occurrence  and  origin  of  the  copper  ore  deposits. 
13.  The  geologic  and  physiographic  history  of  the  Lesser  Antilles. 
Abstract:  Science,  new  ser.,  vol.  17,  pp.  225-226,  1903;  Sci.  Am.  Suppl.,  vol.  55,  p.  22647,  1903. 
14.  The  Guanajuato  mining  district  [Mexico]. 
Eng.  &  Mg.  Jour.,  vol.  77,  pp.  599-601,  642-644,  7  figs.,  1904. 
Includes  observations  on  the  geology  of  the  region  and  the  occurrence  and  character  of  the 
gold  and  silver  ores. 
15.  Report  upon  the  geology  of  the  Santo  Domingo  placer  fields,  Magdalena  district, 
Sonora,  Mexico. 
Greene  Consolidated  Gold  Company  [Prospectus],  New  York,  pp.  12-24,  10  pis.,  1904. 
Describes  the  location  and  general  geology  of  the  district,  and  the  character,  occurrence,  and 
geologic  relations  of  sedimentary  formations,  of  igneous.rocks,  and  of  placer  gold  deposits, 
and  discusses  the  source  of  the  gold. 
16.  Pele  and  the  evolution  of  the  Windward  archipelago. 
Geol.  Soc.  Am.,  Bull.,  vol.  16,  pp.  243-288,  5  pis.,  1905. 
Outlines  the  eruption  phenomena  of  Mont  Pele\  and  from  the  study  of  these  phenomena  and 
data  furnished  by  physiographic,  stratigraphic,  and  paleontologic  investigations,  deduces 
the  geologic  history  of  the  Windward  Islands,  and  discusses  the  nature  and  causes  of 
volcanism. 
17.  Enrichment  in  fissure  veins. 
Eng.  &  Mg.  Jour.,  vol.  80,  pp.  645-646,  1905. 
18.  Physical  history  of  the  Windward  Islands  as  illustrated  in  the  larger  story  of 
Pelee — a  study  of  volcanic  and  oceanic  geography. 
Abstract:  Intern.  Geog.  Cong.,  Eighth,  Rept,,  pp.  244-245,  1905. 
19.  The  physical  geography  of  Mexico — an  introduction  to  the  social,  political,  and 
economic  geography  of  the  republic. 
Abstract:  Intern.  Geog.  Cong.,  Eighth,  Rept.,  pp.  765-766,  1905. 
Hill  (Robert  T.)  and  Vaughan  (T.  Way  land ) . 
1.  Austin  folio,  Texas. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  76,  1902. 
Describes  geographic  and  topographic  features,  general  geologic  relations,  the  character  and 
occurrence  of  Cretaceous,  Tertiary,  and  Quaternary  formations,  and  the  occurrence  of 
economic  products. 
