hayes.]  INTRODUCTION.  15 
List  of  geologic  folios,  showing  mineral  resources  described — Continued. 
No. 
Name  of  folio. 
Tazewell 
Boise 
Richmond. 
London 
Tenmile       district 
special. 
Roseburg 
State. 
Holvoke . 
Big  Trees . 
Absaroka 
Standingstone . 
Tacoma 
Fort  Benton . 
Little    Belt  Moun- 
tains. 
Telluride 
Elmoro . . 
Bristol... 
La  Plata.. 
Monterey. 
Menominee       spe- 
cial. 
Mother   Lode    dis- 
trict. 
Uvalde 
Tintic  special 
Colfax 
Danville 
Walsenburg 
Huntington 
Washington 
Spanish  Peaks. 
Charleston  ... 
Coos  Bay 
Coalgate 
Maynardville 
Va.-W.  Va 
Idaho  
K.v 
....do 
Colo  . . 
Oreg 
Mass.-Conn 
Cal 
Wyo. 
Tenn 
Wash 
Mont 
Mont 
Colo 
....do.... 
Va.-Tenn. 
Colo 
Va.-W.Va 
Mich 
Cal  .. 
Tex.. 
Utah 
Cal 
Ill.-Ind. 
Colo 
W.Va.-Ohio.. 
X>.C-Va.-Md. 
Colo. 
W.Va 
Oreg.. 
Ind.  T 
Tenn  . 
sq.  m, 
Tex. 
950 
86  t 
950 
62 
871 
885 
938 
1,706 
963 
812 
3,234 
3, 295 
236 
950 
957 
237 
938 
125 
428 
1,040 
229 
925 
228 
944 
938 
465 
950 
938 
871 
980 
963 
1,030 
Author. 
Campbell,  M.R. 
Lindgren,  W 
Campbell,  M.  R . 
....do 
Emmons,  S.  F. . . 
Diller,J.S  .... 
Emerson,  B.  K 
Turner,  H.  W.;  Ran- 
some,  F.  L. 
Hague,  A 
Campbell,  M.R 
B.;      Smith, 
Willis 
G.O 
Weed,W.H. 
Woed.W.H. 
Purington,  C.  W 
Hills,  R.  C 
Campbell,  M.R. 
Purington,  C.W 
Darton.N.H 
Van  Hise.C.R.;  Bay- 
ley,  W.  S. 
Ransome,  F.  L 
Vaughan,  T.  W 
Tower,  G.  W.;  Smith, 
G.  O.;  Emmons, 
S.  F. 
Lindgren,  W 
Campbell,  M.R 
Hills,  R.C 
Campbell,  M.  R 
Darton,  N.H.;  Keith, 
A. 
Hills,  R.C 
Campbell,  M.  R 
Diller,J.S 
Taff,J.A 
Keith,  A 
Mineral  products  described 
as  occurring  in  area  of 
folio. 
Hill.R.T.;  Vaughan, 
T.  \V. 
Coal,  iron,  barite. 
Gold,  silver,  coal,  diato- 
maceous  earth,  stone, 
clay,  springs,  artesian 
water. 
Coal,  fluorite,  phosphate, 
clay,  stone,  road  metal. 
Coal,  stone. 
Silver. 
Gold,  copper,  quicksilver, 
coal,  clay,  stone. 
Granite,  emery,  chromite, 
quartz,  trap,  sandstone, 
clay. 
Gold,  silver. 
Silver. 
Coal,  oil,  lime,  clay. 
Coal,  stone,  clay. 
Gold,  silver,  lead,  iron,  gyp- 
sum, coal,  stone,  artesian 
water. 
Coal,  silver,  lead,  copper, 
iron,  sapphires,  mineral 
water. 
Gold,  silver. 
Coal,  stone,  artesian  water. 
Coal,  iron,  zinc,  barite,  mar- 
ble, clay. 
Gold,  silver,  coal. 
Iron,  stone,  clay,  road 
metal. 
Iron. 
Gold,     silver,     manganese, 
quicksilver,  stone. 
Asphalt,    gold,  silver,    iron, 
coal,  water  supply. 
Gold,  silver,  lead,  copper. 
Gold,  stone,  clay,  Avater 
supply. 
Coal,  clay,  gravel,  under- 
ground water. 
Coal,  stone,  clay,  artesian 
water. 
Coal. 
Gold,  iron,  clay,  stone, 
road  materials,  green- 
sand  marls,  underground 
water. 
Coal,  stone,  gold,  silver, 
artesian  tvater. 
Coal,  salt,  oil,  gas,  iron 
Coal,  gold,  stone. 
Coal,  stone,  clay. 
Marble,  coal,  stone,  lead, 
zinc,  lime,  road  materials, 
clay,  water  power. 
Oil,  stone,  lime,  clay,  ce- 
ment, artesian  water. 
