FOR    THE    YEARS    19014905,   INCLUSIVE.  57 
Campbell  (H.  D.). 
1 .  The  Cambro-Ordovician  limestones  of  the  middle  portion  of  the  Valley  of  Virginia. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  20,  pp.  445-447,  1905. 
Names  and  describes  Cambrian  and  Ordovician  formations  in  the  Valley  of  Virginia. 
Campbell  (H.  D. )  and  Howe  (James  Lewis). 
1.  A  new  (?)  meteoric  iron  from  Augusta  Co.,  Virginia. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  15,  pp.  469-471,  1  fig.,  1903. 
Campbell  (John  T.). 
1.  Evidence  of  a  local  subsidence  in  the  interior  [Indiana]. 
Jour.  Geol.,  vol.  9,  pp.  437-438,  1901. 
Difference  in  levelings  made  in  1883  and  in  1901  show  a  subsidence  in  Parke  County,  Indiana. 
Campbell  (MariusR.). 
1.  Hypothesis  to  account  for  the  extra-Glacial  abandoned  valleys  of  the  Ohio  Basin. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  12,  p.  4G2,  1901;  Science,  new  ser.,  vol.  13,  pp.  98-99,  1901. 
Discusses  their  formation  as  due  to  formation  and  persistence  of  local  ice  dams. 
2.  Charleston  folio,  West  Virginia. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  72,  1901. 
Describes  the  geographic  and  topographic  features  of  the  region,  the  stratigraphy,  the  char- 
acter and  occurrence  of  the  Carboniferous  and  Pleistocene  strata,  the  geologic  structure, 
and  the  mineral  resources  of  the  quadrangle. 
3.  Recent  geological  work  in  western  Pennsylvania. 
Eng.  &  Mg.  Jour.,  vol.  73,  p.  245,  1902. 
Abstract  of  paper  read  before  the  Geological  Society  of  Washington. 
4.  Reconnaissance   of    the   borax   deposits   of    Death   Valley   and    Mohave   Desert 
[California]. 
U.  S.  Geol.  Surv.,  Bull.  no.  200,  23  pp.,  1  pi.,  1902;  Eng.  &  Mg.  Jour.,  vol.  71,  pp.  517-519,  1  fig., 
1902. 
Describes  topography  and  geology  of  the  region  and  occurrence  of  borax  deposits. 
5.  Raleigh  folio,  West  Virginia. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  77,  1902. 
Describes  geographic  and  topographic  features,  general  geologic  relations,  the  character  and 
occurrence  of  Carboniferous  formations  and  coal  beds. 
6.  Masontown-Uniontown  folio,  Pennsylvania. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  82,  1902. 
Describes  geographic  and  topographic  features,  general  geologic  relations,  character  and 
occurrence  of  Devonian  and  Carboniferous  strata,  Quaternary  deposits,  and  the  mineral 
resources,  chiefly  coal. 
7.  Recent  geological  work  in  Pennsylvania. 
Abstract:  Science,  new  ser.,  vol.  15,  p.  189,  1902. 
8.  Brownsville-Connellsville  folio,  Pennsylvania. 
U.  S.  Geol.  Surv.,  Geol.  Atlas  of  U.  S.,  folio  no.  94,  1903. 
Describes  geographic,  physiographic,  and  geologic  relations  to  Appalachian  province,  surface 
features  and  drainage,  physiographic  history,  geologic  structure,  character  and  occurrence 
of  the  Carboniierous  strata  and  Quaternary  deposits,  character  and  occurrence  of  the  coal 
beds  and  other  economic  resources.  The  section  on  natural  gas  is  contributed  by  Myron  L. 
Fuller. 
9.  Geographic  development  of  northern  Pennsylvania  and  southern  New  York. 
Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  277-296,  1  fig.,  1903. 
Describes  physiographic  features  of  this  region  and  discusses  the  mode  and  time  of  "their 
origin. 
10.  Variation  and  equivalence  of  the  Charleston  sandstone. 
Jour.  Geol.,  vol.  11,  pp.  459-468,  1903. 
Reviews  the  divergent  views  as  to  the  correlation  of  the  sandstone  of  West  Virginia,  which 
the  writer  named  the  Charleston  sandstone,  with  the  Mahoning  sandstone  of  Pennsylvania, 
and  presents  additional  evidence  for  the  author's  view  as  to  their  distinctness. 
