56  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Calvin  (Samuel) — Continued. 
2.  Concerning  the  occurrence  of  gold  and  some  other  mineral  products  in  Iowa. 
Am.  Geo!.,  vol.  27,  pp.  363-372,  1901. 
Describes  the  origin  and  occurrence  of  various  minerals  and  notes  some  of  the  popular  fallacies 
that  are  held  concerning  them. 
3.  The  geology  and  geological  resources  of  Iowa. 
Int.  Mg.  Cong.,  4th  session,  Proc,  pp.  52-56,  1901. 
Describes  the  stratigraphic  geology  and  the  occurrence  of  economic  products  of  the  State. 
4.  The  geological  formations  of  Iowa. 
Stone,  vol.  25,  pp.  118-124,  1  figs.,  1902. 
Describes  briefly  the  character  and  distribution  of  the  geologic  formations  in  the  State. 
5.  Tenth  annual  report  of  the  State  geologist  [Iowa]. 
Iowa  Geol.  Surv.,  vol.  12,  Ann.  Rept.,  1901,  pp.  11-27,  1  pi.,  1902. 
Gives  a  nomenclature  of  the  divisions  of  the  Glacial  period  and  discusses  the  geologic  occur- 
rence of  oil  and  gas. 
6.  Concrete  examples  from  the  topography  of  Howard  County,  Iowa. 
Am.  Geol.,  vol.  30,  pp.  375-381,  1  pi.,  1902. 
Describes  the  topographic  forms  of  the  region  and  reviews  its  glacial  history. 
7.  The  geology  and  geological  resources  of  Iowa — the  formations  and  their  economical 
values. 
Mines  A:  Minerals,  vol.  22,  pp.  560-561,  1902. 
8.  [In  discussion  of  paper  by  T.  C.  Chamberlin  on  "The  geologic  relations  of  the 
human  relics  of  Lansing,  Kan. "J 
Jour.  Geol.,  vol.  10,  pp.  777-778,  1902. 
9.  Artesian  wells  in  Iowa. 
Iowa  State  Institutions,  Bull.,  vol.  4,  pp.  402-408,  1902. 
Discusses  the  general  conditions  for  artesian  wells  and  the  underground  formations  of  Iowa 
as  sources  for  artesian  water. 
10.  Geology  of  Howard  County  [Iowa]. 
Iowa  Geol.  Surv.,  vol.  13,  pp.  21-79,  15  figs.,  1903. 
Describes  topograpy  anil  drainage,  the  lithologic  and  faunal  characteristics  and  occurrence 
of  Devonian  and  Ordovician  strata  and  their  geologic  relations,  the  surficial  deposits,  and 
the  economic  resources. 
11.  Geology  of  Chickasaw  County  [Iowa]. 
Iowa  Geol.  Surv..  vol.  13,  pp.  255-292,  10  figs.,  1903. 
Describes  topograph)    and   drainage,  the  occurrence,  character,  and  geologic  relations  of 
Devonian  strata  and  Glacial  deposits,  and  the  economic  resources. 
12.  Geology  of  .Mitchell  County  [Iowa]. 
Iowa  Geol.  Surv.,  vol.  13,  pp.  293-338,  12  figs.,  1903. 
Describes  physiographic  feature-,  the  character,  occurrence,  and  geologic  relations  of  Devonian 
strata  and  Glacial  deposits,  and  the  economic  resources. 
13.  Physiography  of  Iowa. 
Iowa  Weather  and  Crop  Service.  Ann.  Rept.  for  1902,  Appendix,  pp.  3-11,  1  pi.,  1903. 
Describes  topography  and  drainage.     Includes  ;,ii  account  of  the  distribution  of  the  drift 
deposits  and  their  relation  to  physiographic  features. 
14.  Twelfth  annual  report  of  the  State  geologist  [Iowa]. 
Iowa  Geol.  Surv.,  vol.  14,  pp.  1-6,  3  pis.  (maps),  1904. 
15.  The  Aftonian  gravels  and  their  relations  to  the  drift  sheets  in  the  region  about 
Afton  Junction  and  Thayer  [Iowa]. 
Davenport  Acad.  Sci.,  1'roc,  vol.  10,  pp.  18-31,  7  pis.,  1905. 
Campbell  (CM.). 
1.  Mining  in  the  Rossland  district  [British  Columbia]. 
Cai].   Mg.  Inst..  Jour.,  vol.  5,  pp.  447-483,  36  figs.,  2  pis.,  1902.     Abstract:  Can.  Mg.  Rev.,  vol.  21, 
pp.  183-194,  1902. 
Contains  notes  on  the  rocks  of  this  area. 
