158  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Hayes  (Charles  Willard)—  Continued. 
5.  Rome  folio,  Georgia-Alabama. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio,  no.  78,  L902. 
Describes  the  geographic  and  topographic  features,  the  general  geologic  structure,  the  char- 
acter and  occurrence  of  Cambrian,  Silurian,  Devonian,  Carboniferous,  and  Neocene  (?) 
strata,  and  the  occurrence  of  iron,  bauxite,  slate,  and  limestone. 
6.  The  coal  fields  of  the  United  States. 
U.  S.  Geol.  Surv.,  22d  Ann.  Rept.,  pt.  3,  pp.  7-24,  1  pi.  (map),  1902. 
Describes  character,  distribution  and  geologic  occurrence  of  coal  in  the  United  States. 
7.  The  southern  Appalachian  coal  field. 
U.  S.  Geol.  Surv.,  22d  Ann.  Rept,,  pt,  3,  pp.  227-263,  3  pis.,  1  fig.,  1902. 
Describes  extent,  general  geologic  relations,  structure  and  stratigraphy  of  the  field,  the  char- 
acter and  occurrence  of  the  coal  beds,  the  composition,  properties,  and  production  of  coal. 
8.  Some  facts  and  theories  bearing  on  the  accumulation  of  petroleum. 
Abstract:  Science,  new  ser.,  vol.  16,  p.  1028,  1902. 
9.  Introduction  to  contributions  to  economic  geology,  1902. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  9-14,  1903. 
Describes  the  publications  of  the  U.  S.  Geological  Survey  in  which  papers  treating  of  economic 
subjects  appear. 
10.  Investigation  of  nonmetalliferous  economic  minerals. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  29-SO,  1903. 
Describes  character  and  scope  of  work  done  by  the  U.  S.  Geological  Survey  in  the  investiga- 
tion of  nonmetalliferous  minerals. 
11.  Manganese  ores  of  the  Cartersville  district,  Georgia. 
U.  S.  Geol.  Surv.,  Bull,  no  213,  p.  232,  1903. 
Describes  briefly  the  character  and  occurrence  of  the  manganese  ores  in  this  district. 
12.  Coal  fields  of  the  United  States. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  257-269,  1903. 
Describes  distribution  of  coal  in  the  United  States,  the  geologic  relations  of  the  coal  fields, 
fuel  values  of  coals,  and  their  development,  production,  and  marketing. 
13.  Oil  fields  of  the  Texas-Louisiana  Gulf  Coastal  Plain. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  345-352,  1903. 
Describes  topography,  stratigraphy,  and  geologic  structure  of  the  region,  and  the  occurrence, 
character,  and  utilization  of  the  oil. 
14.  Asphalt  deposits  of  Pike  County,  Arkansas. 
U.  S.  Geol.  Surv.,  Bull.  no.  213.  pp.  353-355, 1903. 
Describes  the  character  and  occurrence  of  deposits  of  asphalt  in  sands  of  the  Trinity  group. 
15.  Origin  and  extent  of  the  Tennessee  white  phosphates. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  418-423,  1903. 
Describes  varieties  of  white  phosphate,  the  origin  and  extent  of  the  deposits,  and  possible 
extensions  of  the  field. 
16.  Introductions  to  "Contributions  to  economic  geology,  1903." 
U.  S.  Geol.  Surv.,  Bull.  no.  225,  pp.  11-17,  1904. 
Gives  a  brief  statement  regarding  the  publications  of  the  United  States  Geological  Survey 
bearing  upon  economic  geology.    Includes  a  list  of  the  geologic  folios,  showing  the  mineral 
resources  described  in  each. 
17.  Investigation  of  nonmetalliferous  economic  minerals. 
U.  S.  Geol.  Surv.,  Bull.  no.  225.  pp.  25-27, 1904. 
A  brief  summary  statement  regarding  investigations  of  nonmetalliferous  economic  minerals 
completed  during  the  past  year  or  in  progress. 
18.  Contributions  to  economic  geology,  1904.     Introduction. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  11-18,  1905. 
Explains  the  purpose  of  the  bulletin  and  describes  the  publications  of  the  Survey  bearing 
upon  economic  geology. 
19.  Investigation  of  iron  and  nonmetalliferous  economic  minerals. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  28-31, 1905. 
Reviews  the  work  during  the  year  1904  of  the  U.  S.  Geological  Survey  upon  iron  and  nonmet- 
alliferous minerals  of  economic  importance. 
