304  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Shepard  (Edward  M.). 
1.  Table  of  geological  formations. 
Drury  Coll.,  Bradley  Field  Geol.  Station,  Bull.,  vol.  1,  pp.  41-42,  1904. 
Gives  in  tabular  form  the  gelogic  formations  of  Missouri  correlated  with  those  of  Arkansas. 
2.  Notes  on  the  wells,  springs,  and  general  water  resources  of  Missouri. 
U.  S.  Geol.  Surv.,  Water-Supply  and  Irrigation  Paper  no.  102,  pp.  389-440,  1904. 
3.  The  New  Madrid  earthquake. 
Jour.  Geol.,  vol.  13,  pp.  45-62,  5  figs.,  1905. 
Describes  the  phenomena  of  the  earthquake,  features  of  the  earthquake  area  and  associated 
artesian  conditions,  and  discusses  the  cause  of  the  earthquake. 
4.  Spring  system  of  the  Decaturville  dome,  Camden  County,  Missouri. 
U.  S.  Geol.  Surv.,  Water-Supply  and  Irrigation  Paper  no.  110,  pp.  113-125,  4  figs.,  1905. 
5.  Underground  waters  of  eastern  United  States:  Missouri. 
U.  S.  Geol.  Surv.,  Water-Supply  and  Irrigation  Paper  no.  114,  pp.  209-219,  3  figs.,  1905. 
Describes  the  general  geology  and  the  physiographic  provinces  with  particular  reference  to 
their  underground  water  supplies. 
6.  Key  to  the  rocks  and  geological  horizons  of  Greene  County  [Missouri]. 
Drury  Coll.,  Bradley  Geol.  Field  Station,  Bull.,  vol.  1,  pp.  53-57,  1905. 
Shepherd  (E.  S. ),  Day  (A.  L. )  and. 
1.  The  phase-rule  and  conceptions  of  igneous  magmas.     Discussion  of  paper  by  Mr. 
T.  T.  Read. 
See  Day  (A.  L.)  and  Shepherd  (E.  S.),  1. 
Sheridan  (Jo  E.). 
1.  Annual  report  of  the  mine  inspector  for  the  Territory  of  New  Mexico. 
U.  S.  Mine  Inspector  for  the  Territory  of  N.  Mex.,  Ann.  Rept.  to  the  Secretary  of  the  Interior 
for  the  year  ended  June  30,  1904.    Washington,  1904,  79  pp. 
Includes  a  description  of  the  New  Mexico  coal  fields,  showing  the  occurrence,  character,  geo- 
logic relations,  etc.,  of  the  coal  seams. 
Sherwin  (R.  S.). 
1.  Notes  on  the  geology  of  the  Antelope  Hills  [Oklahoma]. 
Kans.  Acad.  Sci.,  Trans.,  vol.  18,  pp.  83-84,  1903. 
Gives  a  brief  account  of  the  geology  of  this  region. 
2.  Notes  on  the  theories  of  origin  of  gypsum  deposits. 
Kans.  Acad.  Sci.,  Trans.,  vol.  18,  pp.  85-88,  1903. 
Discusses  the  origin  of  the  gypsum  deposits  of  Kansas  and  Oklahoma. 
Sherzer  (William  Hittell). 
1.  Ice  work  in  southeastern  Michigan. 
Jour.  Geol.,  vol.  10,  pp.  194-216,  8  figs.,  1902. 
Describes  the  general  topography,  drift  and  ice  action,  and  scouring  in  the  region. 
2.  Glacial  studies  in  the  Canadian  Rockies  and  Selkirks.     (Smithsonian  Expedition 
of  1904. )     Preliminary  report. 
Smith.  Misc.  Coll.  (Quart.  Issue,  vol.  2,  pt.  4),  vol.  47,  pp.  453-496,  13  pis.,  31  figs.,  1905. 
Shimek  (B.). 
1.  Recent  decline  in  the  level  of  Lake  Nicaragua. 
Am.  Geol.,  vol.  28,  pp.  396-398,  1901. 
Refers  to  a  paper  published  in  1896  on  the  same  subject. 
2.  The  loess  of  Iowa  City  and  vicinity  [Iowa]. 
Iowa  State  Univ.,  Lab.  Nat.  Hist.,  Bull.,  vol.  5,  pp.  195-212,  1901;  Am.  Geol.,  vol.  28,  pp.  344- 
358,  1901. 
Gives  list  of  loess  and  recent  fossils,  with  notes  on  some  of  the  species. 
3.  Pyramidula  shimekii  (Pilsbry)  Shimek. 
Iowa  St.  Univ.,  Lab.  Nat.  Hist.,  Bull.,  vol.  5,  pp.  139-145,  1901. 
4.  The  loess  of  Natchez,  Mississippi. 
Am.  Geol.,  vol.  30,  pp.  279-299,  7  pis.,  1902. 
Gives  lists  of  fossils  found  in  the  loess  and  describes  the  formation  and  character  of  the  loess 
deposits. 
