64  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Cirkel  (Fritz). 
1.  Vorkommen  und  Gewinnung  von  Asbest  in  Canada. 
Zeitsch.  f.  prak.  Geol.,  Jg.  11,  pp.  123-131,  3  figs.,  1903. 
Describes  occurrence  and  character  of  asbestos  deposits  in  Quebec  and  the  mining  develop- 
ments. 
2.  Mica  deposits. 
Can.  Mg.  Rev.,  vol.  23,  pp.  82-86,  104-108,  128-133,  13  figs.,  1904. 
Describes  the  occurrence  and  character  of  mica  and  phlogopite  deposits  in  Canada  and  else- 
where and  their  economic  development  in  Canada. 
3.  Asbestos:  its  occurrence,  exploitation,  and  uses. 
Can.,  Dept.  of  the  Interior,  Mines  Branch,  Ottawa,  1905.    169  pp.,  38  figs.,  1  map,  and  2  charts. 
4.  Mica:  its  occurrence,  exploitation  and  uses. 
( 'an.,  Dept.  of  the  Interior,  Mines  Branch,  Ottawa,  1905.     148  pp.,  1  pi.,  38  figs.,  and  1  map. 
Clapp  (Frederick  G.). 
1.  Geological  history  of  the  Charles  River  [Massachusetts]. 
Tech.  Quart.,  vol.  14,  pp.  171-201,  13  figs.,  pp.  255-269,  4  figs.,  1901;  Am.  Geol.,  vol.  29,  pp.  218- 
233,  4  pis.,  1902. 
Describes  the  various  stages  of  the  river's  development  and  their  causes,  its  relation  to  the 
geologic  structure  and  the  Tertiary  and  Glacial  history  of  the  region. 
2.  Relations  of  gravel  deposits  in  the  northern  part  of  Glacial  Lake  Charles,  Massa- 
chusetts. 
Jour.  Geol.,  vol.  12,  pp.  198-214,  3  figs.,  1904. 
Describes  sand  plains,  gravel,  and  other  Glacial  deposits  in  the  valley  of  the  Charles  River  in 
Massachusetts,  and  discusses  their  characteristics  and  formations,  the  disappearance  of  the 
Glacial  ice,  and  connected  events. 
3.  Water  resources  of  the  Curwensville,  Patton,  Ebensburg,  and  Barnesboro  quad- 
rangles, Pennsylvania. 
U.  S.  Geol.  Surv.,  Water-Supply  and  Irrigation  Paper  no.  110,  pp.  159-163,  1905. 
4.  Limestones  of  southwestern  Pennsylvania. 
U.  S.  Geol.  Surv.,  Bull.  no.  249,  52  pp.,  7  pis.,  1905. 
Describes  the  character,  occurrence,  and  geologic  relations  of  limestones  of  southwestern 
Pennsylvania,  with  especial  reference  to  their  availability  for  the  manufacture  of  cement. 
Clapp  (Frederick  G.),  Fuller  (M.  L.)  and. 
1.  Marl-loess  of  the  lower  Wabash  Valley. 
See  FuUer  (M.  L.)  and  Clapp  (F.  G.),  1. 
2.  Patoka  folio,  Indiana-Illinois. 
See  Fuller  (Myron  L.)  and  Clapp  (Frederick  G.),  2. 
Clark  (P.  Edwin),  Van  Ingen  (Gilbert)  and. 
1.  Disturbed  fossiliferous  rocks  in  the  vicinity  of  Rondout,  N.  Y. 
See  Van  Ingen  (Gilbert)  and  Clark  (P.  E.),  1. 
Clark  (W.  Blair). 
1.  Drainage  modifications  in  Knox,  Licking,  and  Coshocton  counties  [Ohio]. 
Denison  Univ.,  Sci.  Lab.,  Bull.,  vol.  12,  art.  1,  pp.  1-16,  3  pis.,  1902. 
Discusses  modifications  produced  in   the  drainage  of  this  area  by  the  ice  of  the  Glacial 
period. 
Clark  (William). 
1.  Some  new  points  on  the  fin  attachment  of  Dinichthys  and  Cladodus. 
Ohio  State  Acad.  Sci.,  6th  Ann.  Rept.,  pp.  46-48,  3  tigs.,  1898. 
Clark  (William  Bullock): 
1.  Maryland  Geological  Survey,  volume  four. 
Baltimore,  The  Johns  Hopkins  Press,  1902.    524  pp.,  69  pis.,  34  figs. 
2.  Reports  on  Cecil  County  [Maryland]. 
Md.  Geol.  Surv.,  Cecil  Co.,  322  pp.,  30  pis.,  24  figs.,  1902.     Atlas  with  3  maps. 
