GEOLOGIC    POLIOS.  13 
List  of  geologic  folios,  showing  mineral  resources  described   -Continued. 
No. 
Name  of  folio. 
State. 
Area 
in 
sq.  m. 
Author. 
Mineral  products  described 
as    occurring   in   area    of 
folio. 
V'fi 
Bradshaw      Moun- 
tains. 
Sundance 
986 
857 
894 
250 
236 
236 
969 
228 
227 
938 
J  agger,     T.     A.,    jr.; 
Palache,  C. 
Darton,  N.  II 
Gold,    silver,    copper,    iron, 
building  stone,  onyx  mar- 
ble. 
Gold,  tin,  silver,  lead,  coal, 
gypsum,  bentonite,ttnd<  r 
ground  water. 
Underground     water,     coal, 
gypsum,  lime. 
Copper,     iron,     lead,     gold, 
kaolin. 
Gold,  silver,  zinc,  lead,  build- 
ing stone,  lime. 
137 
Wyo.-S.  Dak  . 
Wyo.-S.  Dak.- 
Mont. 
Ariz 
1?8 
Darton,N.IL;  O'Har- 
ra,  C.  C. 
i?q 
Clifton 
130 
Cross,    W.;    Spencer, 
A.     C;     Ransome, 
F.  L. 
Cross,  W.;  Howe,  E.; 
Irving,  J.  D.;  Em- 
mons, W.  II. 
Taff,  J.  A 
131 
Needle  Mountains . . 
Muscogee 
132 
Ind.  T 
Pa 
133 
Butts,  C 
Coal,   clay,   shale,    building 
stone,  underground  water. 
Clay,  coal,  oil,  gas,  building 
stone. 
Cement,  iron  ore,   oil,  gas, 
gravel. 
134 
Pa 
Woolsey,  L.  II 
135 
Colo. .. 
6.  Mineral  Resources  of  the  United  States. — From  1883  to  1894,  inclusive,  an  octavo 
cloth-bound  volume  bearing  the  above  title  was  issued  annually,  except  that  the  reports 
for  the  years  1883-84  and  1889-90  were  included  by  pairs  in  single  volumes.  The  first 
of  this  series  was  Mineral  Resources  of  the  United  States,  1882;  the  last,  Mineral  Resources 
of  the  United  States,  1893.  In  1894  this  form  of  publication  was  discontinued,  in  accord- 
ance with  an  act  of  Congress,  and  the  statistical  material  was  included  in  certain  parts 
of  the  sixteenth,  seventeenth,  eighteenth,  nineteenth,  twentieth,  and  twenty-first  annual 
reports.  The  separate  publication  of  the  series  on  mineral  resources  was  resumed,  how- 
ever, in  1901,  in  accordance  with  an  act  of  Congress,  and  five  volumes  of  the  new  series, 
Mineral  Resources  of  the  United  States  for  1900,  for  1901,  for  1902,  for  1903,  and  for  1904 
have  been  issued. 
This  publication  contains  a  systematic  statement  of  the  production  and  value  of  the 
mineral  products  of  the  United  States,  a  summary  of  new  mineral  resources  developed, 
and  occasional  short  papers  on  economic  geology  when  these  are  necessary  to  account  for 
the  new  developments. 
