146  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Gresley  (W.  S.). 
1.  Possible  new  coal  plants,  etc.,  in  coal. 
Am.  Geol.,  vol.  27,  pp.  6-14,  6  pis.,  1901. 
Describes  structures  occurring  in  coal  beds  which  may  be  of  vegetable  origin. 
Grider  (R.  L.),  Bailey  (E.  W.),  Rath  (CM.). 
1.  A  garnetiferous  bed  in  Golden  Gate  Canyon,  Jefferson  County,  Colorado. 
See  Bailey  (E.  W.),  Rath  (0.  M.),  Grider  (R.L.),  1. 
Griffith  (William). 
1.  An  investigation  of  the  buried  valley  of  Wyoming  [Pennsylvania]. 
Wyoming  Hist,  and  Geol.  Soc,  Proc.  and  Coll.,  vol.  6,  pp.  27-36,  with  map,  1901.    Abstract: 
Am.  Geol.,  vol.28,  p,  324,  1901. 
Describes  glacial  phenomena  of  the  region. 
2.  The  anthracite  of  the  Third  Hill  Mountain,  West  Virginia. 
Franklin  Inst.,  Jour.,  vol.  154,  pp.  431-439,  1  fig.,  1902. 
Contains  notes  on  the  general  geology  of  the  region  and  the  recurrence  and  character  of  coal. 
3.  The  anthracite  of  the  Third  Hill  Mountain,  West  \rirginia;  the  effect  of  crushing 
movements  on  the  quality  of  the  coal. 
Mines  &  Minerals,  vol.  23,  pp.  293-294,  1  fig.,  1903. 
Describes  the  general  geology  of  the  region. 
4.  A  Missouri  coal  field. 
Eng.  &  Mg.  Jour.,  vol.  77,  pp.  564-565,  5  figs.,  1904. 
Describes  the  occurrence  and  character  of  coal  in  Morgan  County,  Missouri. 
Griffiths  (A.  B.). 
1.  The  volcanic  dust  of  Mont  Pelee. 
Chemical  News,  vol.  88,  p.  231,  1903. 
Griggs  ( Robert  F. ) . 
1.  The  thickness  of  the  Columbus  limestone. 
Ohio  Nat.,  vol.  4.  pp.  67-68,  1904. 
Grimsley  (G.  P.). 
1.  Kansas  mines  and  minerals. 
Kans.  Acad.  Sci..  Trans.,  vol.  17,  pp.  200-207,  1901. 
Gives  an  account  of  the  occurrence  of  the  various  economic  products  of  the  State. 
2.  Economic  geology  of  Iola  [Kansas]  and  vicinity. 
Kans.  Acad.  Sci.,  Trans.,  vol.  18,  pp.  78-82,  1  pi.,  1903. 
Describes  production  of  natural  gas  and  the  mineral  industries  of  this  locality. 
3.  Oil,  gas,  and  glass,  chemical  industries,  and  minerals  in  Kansas. 
Kans.,  Bur.  Labor  and  Industry,  1st  Bien.  Kept.,  pp.  323-350,  2  pis.  and  1  map,  1903. 
Discusses  the  origin  of  oil  and  gas,   the  geological  conditions  of  accumulation,  duration  of 
supply,  and  their  occurrence  in  Kansas. 
4.  Gypsum  deposits  in  Michigan. 
U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  45-47,  1904. 
Describes  occurrence,  character,  economic  development,  and  geologic  relations  of  the  gypsum 
deposits. 
5.  Gypsum  deposits  in  Kansas. 
U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  53-59,  1  pi.,  3  figs.,  1904. 
Describes  character,  occurrence,  economic  development,  and  geologic  relations  of  the  gypsum 
deposits  in  Kansas. 
6.  A  theory  of  origin  for  the  Michigan  gypsum  deposits. 
Am.  Geol.,  vol.  34,  pp.  378-387,  1904. 
Describes  the  general  geology  of  lower  Michigan  and  the  geological  history  of  the  Michigan 
basin,  and  discusses  the   conditions  under  which  the  gypsum  deposits  of  this  area  were 
produced. 
