238         CONTRIBUTIONS    TO    ECONOMIC   GEOLOGY,    1907,    PART   II. 
Analyses  of  coal  samples  from  the  Great  Divide  Basin  and  adjacent  coalfields,  Wyoming- 
Continued. 
Geolo 
Undifferentiated  Tertia'ry- 
Wa- 
satch. 
No.  oi 
l  PI  XII 
46. 
51. 
64. 
Labor 
5815. 
5817. 
a  3808. 
a  3826. 
a  3806. 
a  3610. 
a  3605. 
5949. 
Samp 
Ca 
Bi 
e  as  received: 
17.24 
31.88 
49.28 
1.60 
.14 
5.71 
59.08 
.33 
33.14 
5,719 
10,294 
22.22 
38.68 
30.25 
8.85 
.66 
5.68 
50.19 
.96 
33.66 
4,701 
8,462 
13.59 
31.77 
49.35 
5.29 
.33 
5.22 
61. 05 
.83 
27.28 
5,785 
10, 413 
13.19 
31.70 
50.23 
4.88 
.24 
24.54 
32.45 
37.38 
5.63 
.24 
11.45 
42.58 
39.33 
6.64 
.38 
5.27 
59.66 
.94 
27.11 
6,050 
10,890 
10.09 
41.01 
41.91 
6.99 
.49 
5.53 
62.66 
1.26 
23.07 
6,279 
11,302 
37.80 
25.86 
22.  30 
(Ash                        
14.04 
1.46 
2,436 
4,385 
Loss  of  moisture  on  air  drying 
5.60 
7.30 
4.30 
2.30 
5.10 
2.50 
2.20 
28.00 
Air-dr 
ied  sample: 
12.33 
33.77 
52.20 
1.70 
.15 
5.39 
62.58 
.35 
29.83 
6,058 
10,905 
16.09 
41.73 
32.63 
9.55 
.71 
5.25 
54.14 
1.04 
29.31 
5,071 
9,128 
9.70 
33.20 
51.57 
5.53 
.34 
4.95 
63.80 
.87 
24.51 
6,045 
10,881 
11.15 
32.45 
51.41 
4.99 
.25 
20.49 
34.19 
39.39 
5.93 
.25 
9.18 
43.67 
40.34 
6.81 
.39 
5.12 
61.19 
.96 
25.53 
6,205 
11,169 
8.07 
41.93 
42.85 
7.15 
.50 
5.40 
64.  07 
1.29 
21.59 
6,420 
11,556 
13.61 
X 
35.92 
*-•  1 
30.97 
Ph 
jAsh '.. 
19.50 
\  Sulphur 
2.03 
tz< 
P 
Nitrogen 
Ca 
Bi 
Thick 
3,383 
6,090 
Ft.  in. 
5    4 
Ft.  in. 
7    6 
Ft.  in. 
7    0 
Ft.  in. 
7    0 
Ft.  in. 
8    0 
Ft.  in. 
5    0 
Ft.  in. 
7    6 
a  Samples  collected  in  the  coal  fields  of  east-central  Carbon  County.  Veatch,  A.  C,  Bull.  U.  S.  Geol. 
Survey  No.  316,  1907,  pp.  253-258. 
3921.  Fort  Steele,  20  miles  north  of,  NE.  \  SW.  \  sec.  9,  T.  24  N.,  R.  85  W. 
3925.  Fort  Steele,  25  miles  northwest  of,  SE.  \  NE.  \  sec.  23,  T.  25  N.,  R.  86  W.;  upper  part  of  bed,  7 
feet  10  inches  thick. 
5816.  Lost  Soldier,  9  miles  northeast  of,  SW.  J-  SE.  i  sec.  6,  T.  27  N..  R.  89  W. 
5818.  Lost  Soldier,  9  miles  northeast  of,  SW.  £  NW.  \  sec.  8,  T.  27  N.,  R.  89  W.    Abandoned  slope. 
5826.  Lost  Soldier,  H  miles  east  of,  NE.  \  NW.  £  sec.  16,  T.  26  N.,  R.  90  W.     Abandoned  tunnel. 
3790.  Hanna,  16  miles  northwest  of,  SW.  \  NE.  \  sec.  11,  T.  24  N.,  R.  83  W. 
3548.  Walcott.  9  miles  southeast  of,  NW.  \  SE.  \  sec.  1,  T.  20  N.,  R.  83  W. 
5815.  Rawlins,  8  miles  west  of,  SW.  \  SW.  \  sec.  12,  T.  21  N.,  R.  89  W.    Surface  exposure. 
5817.  Cherokee  siding,  100  yards  north  of,  NW.  \  SE.  \  sec.  10,  T.  20  N.,  R.  91  W.    Abandoned  slope. 
3808.  Walcott,  12  miles  north  of,  NW.  \  SW.  i  sec.  25,  T.  23  N.,  R.  84  W. 
3826.  Walcott,  12  miles  north  of,  SE.  \  SW.  \  sec.  25,  T.  23  N.,  R.  84  W. 
3806.  Same;  surface  sample. 
3610.  Hanna;  lower  bench  of  No.  2  bed. 
3605.  Hanna;  lower  part  of  top  bench  of  No.  1  bed. 
5949.  Latham;  one-half  mile  northwest  of,  SE.  \  SE.  \  sec.  14,  T.  20  N.,  R.  93  W.    Shallow  prospect. 
COMPARATIVE  VALUE  OF   COALS. 
MESAVERDE    COAL. 
The  coals  of  Mesaverde  age  are  not  developed  to  any  great  extent 
in  this  field.  In  the  region  just  south  of  Rawlins  and  along  the 
western  edge  of  the  Hanna  field  the  openings  and  prospects  are  shal- 
low and  are  worked  for  local  use  only.  One  of  these,  the  Dillon 
mine  (abandoned),  4  miles  southwest  of  Rawlins,  is  filled  with  wTater 
below  a  depth  of  about  350  feet.  Samples  from  the  Mesaverde 
formation  at  Rock  Springs  a  show  heating  values  ranging  from  11,101 
to  12,271  British  thermal  units  on  samples  as  received,  and  from 
11,574  to  12,782  British  thermal  units  on  air-dried  samples.  Sam- 
ples  taken  from  prospects   and  openings  similar  to  those  south  of 
a  See  report  by  A.  R.  Schultz,  pp.  256-282  of  this  volume, 
