322  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Stevens  (E.  A.) — Continued. 
2.  Basaltic  zones  as  guides  to  ore  deposits  in  the  Cripple  Creek  district,  Colorado. 
Am.  Inst.  Mg.  Engrs.,  Trans.,  vol.  33,  pp. 686-698,  4  figs.,  1903. 
Describes  the  character  and  occurrence  of  igneous  rocks  and  the  relations  of  the  dikes, 
fissures,  and  ore  deposits. 
Stevens  (Horace  J.). 
1.  General  information  of  the  geology  and  mines  of  the  Lake  Superior  copper  district. 
Am.  Inst.  Mg.  Engrs.,  Bi-mo.  Bull.  no.  1,  pp.  208-222,  1  fig.,  1905. 
Includes  an  account  of  the  geology  of  the  region. 
Stevenson  (John  J.) . 
1.  Notes  upon  the  Mauch  Chunk  of  Pennsylvania. 
Am.  Geol.,  vol.  29,  pp.  242-249,  1902. 
Discusses  the  nomenclature  of  a  portion  of  the  Carboniferous,  presents  a  section  in  Pennsyl- 
vania, giving  a  list  of  fossils  from  the  various  horizons  determined  by  Weller,  and  discusses 
the  correlation  of  the  formations. 
2.  The  Lower  Carboniferous  of  the  Appalachian  Basin. 
Abstract:  Science,  new  ser.,  vol.  16,  pp.  259-260,  1902. 
3.  Joseph  Le  Conte  (obituary). 
Abstract:  N.  Y.  Acad.  SeL,  Ann.,  vol.  14,  pp.  150-151,  1902. 
4.  Lower  Carboniferous  of  the  Appalachian  Basin. 
Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  15-96,  1903. 
Describes  occurrence,  stratigraphy,  lithologic  characters,  and  geologic  relations  of  Lower 
Carboniferous  formations  in  the  Appalachian  region  and  discusses  their  nomenclature  and 
correlation,  and  the  physiographic  conditions  prevailing  during  their  deposition. 
5.  J.  Peter  Lesley. 
Science,  new  ser.,  vol.  18,  pp.  1-3,  1903. 
6.  Carboniferous  of  the  Appalachian  Basin. 
Geol.  Soc.  Am.,  Bull.,  vol.  15,  pp.  37-210,  1904. 
Describes  in  detail  the  distribution,  character,  and  geologic  relations  of  the  various  beds  of 
the  Pottsville  of  the  Pennsylvanian  scries  in  the  Appalachian  region,  giving  numerous 
detailed  sections,  and  discusses  their  nomenclature  and  correlation. 
7.  Memoir  of  J.  Peter  Lesley. 
Geol.  Soc.  Am.,  Bull.,  vol.  15,  pp.  532-541,  1  pi.  (por.),  1904. 
Includes  a  list  of  his  published  writings. 
Stevenson  (Robert). 
1.  The  deposition  of  ores  from  an  igneous  magma. 
Eng.  &  Mg.  Jour.,  vol.  76,  p.  882,  1903. 
2.  The  deposition  of  ores  from  an  igneous  magma. 
Eng.  &  Mg.  Jour.,  vol.  77,  pp.  272-273,  1904. 
3.  The  deposition  of  ores  from  an  igneous  magma. 
Eng.  &  Mg.  Jour.,  vol.  77,  pp.  472-474,  4  figs.,  1904. 
Illustrates  the  formation  of  an  igneous  magma  by  an  example  based  upon  geologic  structure 
in  Alaska. 
Stewart  (Alban). 
1.  Teleosts  of  the  upper  Cretaceous. 
Kans.  Univ.  Geol.  Surv.,  vol.  6,  pp.  257-390,  41  pis.,  1900. 
Stewart  (John  L.). 
1.  Ore  deposits  and  industrial  supremacy. 
Econ.  Geol.,  vol.  1,  pp.  257-264,  1905. 
Stoek  (H.  H.). 
1.  The  Pennsylvania  anthracite  coal  field. 
U.  S.  Geol.  Surv.,  22d  Ann.  Kept.,  pt.  3,  pp.  5.5-117,  5  pis.,  12  figs.,  1902. 
Describes  the  extent,  subdivisions,  general  geologic  relations,  and  structure  <>f  the  Pennsyl- 
vania anthracite  coal  field,  the  number  and  extent  of  workable  beds,  the  character,  com- 
position, production,  and  marketing  of  the  coal. 
