178 



GEOLOGICAL SUEVEY OF THE TERRITORIES. 





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Carbon. 



Ash. 





Variety. 



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Remarks. 





41.09 



64.90 



47.50 



52. 992 



9.60 



2.00 



6.248 



10 analyses, from Geological Re- 

 port 'for 1873, Survey of Illi- 

 nois. 







47.81 







45.42 







6.77 



From table of 64 averages of 

 coal analyses, in Geological 

 Report 1870, Survey of Iowa, 

 "White. 













Missouri coals 



41. 443 



79.28 



27.72 



40. 816 



19.97 



2.05 



9.026 



Ill analyses, from Geological 

 Reports for 1873-74, Survey 

 of Missouri. 



Foreign lignites or 

 brown coals. 



31. 596 



71.71 



47.46 



60. 414 



14.95 



0.59 



7. 521 



10 analyses, from Dana's Min- 

 eralogy. 



Lignites of Colorado 

 and New Mexico. 



41. 284 



59. 72 



44.44 



52. 384 



20.20 



2.00 



5.616 



14 analyses, from table of proxi- 

 mate analyses of lignites, Re- 

 port of A. R. Marvine, United 

 States Geological Survey, Re- 

 port of 1873. 



Lignites of Wyoming 

 Territory. 



40. 972 



54.46 



47.04 



51. 216 



9.60 



1.73 



5.331 



10 analyses, from Report of A. 

 R. Marvine. 



Lignites of Utah Ter- 

 ritory. 



52. 418 



46.84 



36.35 



43. 035 



7.50 



0.97 



4.553 



6 analyses, from Report of A. R. 

 Marvine. 



Lignites of California 



53. 613 



58.32 



47.83 



49. 631 



4.01 



2.26 



3.393 



10 analyses, from Report of A. 

 R. Marvine. 



Lignites of Montana 

 and Oregon. 



47. 224 



64.18 



41.98 



49.34 



12.00 



3.19 



7.036 



5 analyses, from Report of A. R. 

 Marvine. 



Lignites of Vancou- 

 ver's Island and 

 British Columbia. 



44. 468 



51.81 



.45. 44 



47. 552 



18. 55 



2.15 



6.24 





The excellent tables and notes on the western lignites in Mr. Mar- 

 vine's report for 1873, and the notes on the lignites east of the mount- 

 ains in the reports of Dr. Hayden and Mr. Holmes, preclude the neces- 

 sity of any further remarks here. 



GYPSUM. 



Gypsum is the only remaining mineral of economical importance in 

 the district. The localities and general description have been given in 

 previous chapters. It occurs in quantity on Eagle Eiver and Frying- 

 Pan Creek. 



The list of minerals given in the catalogue accompanying the report 

 is, of necessity, small, the sedimentary formations prevailing in the dis- 

 trict, being sandstones mainly of Cretaceous and Tertiary age. 



CATALOGUE OF MFNEKALS NOTED IK THE AEEA ASSIGNED 

 TO THE SECOND OK MIDDLE DIVISION, UNITED STATES 

 GEOLOGICAL SURVEY, IN 1874. 



Agate. Cloudy, of white, brown, and gray colors, on the plateaus be- 

 tween the Grand and Gunnison Rivers. Moss Agate, of poor variety, 

 in the valley of the Gunnison Eiver, west of the mesa, near the Grand. 



Amphibole. Hornblende in small needle-like crystals, in some of the 



