598 



GEOLOGY AXD MINING INDUSTRY OF LEADVILLE. 



Table VI. — Lime, magnesia, aid cli!orinc ddaminations. 



Locality. 



153c 

 153ri 



170b 

 170a 

 171b 



Silurian. 

 ...do ... 



do . 



...do 



Bine Limestone. 



...do 



.. do 



..do 



"Weber Grits . 

 ...do 



Below Excelsior mine, Buckskin gulch 



Monte Cristo Ridge, Quandary Peak 



Dyer Mountain, marbleized bed 



Quarry in California gulch 



Below Dyer Mine, Dyer Mountain (light blue, com- 



pact). 

 Below Dyer mine, Dyer Mounta 



I (pinkish, decom- 



:d). 



Red amphitheater. Buckskin gulch 



Silver Wave claim, Iron Hill 



Dunkin mine, Fryer Ilill (lime-sand) 



Chrysolite mine. Fryer Hill ( lime-sand) 



Empire Hill 



Ridge south of Sacramento mine 



Sacramento mine, Spring Valley 



South slope of "White Ridge, Horseshoe gulch — 



London mine, London Mountain 



Ridge west of Mount Silverheels, Park County. 



East bank of Beaver Creek 



Beaver Creek, west base of Mount Silverheels.. 

 Robinson limestone, lower bed 



...do ..■ 

 Trias ?. 



Robinson limestone, upper Led 



(Con. fracture) Silverheels, between Fairplay and Como 



(Con. fracture) first ridge west of Crooked Creek 



(Con. fracture) Jacque Mountain, near summit 



Calcareous shale, near flume northeasc of Fairplay 



.do . 



Lake beds i Marl from Greenback shaft, Graham Park . 



25.43 

 46.05 

 53.10 

 47.50 

 36.27 



34.30 



49.30 

 54.08 

 55.14 

 54.09 



4.03 

 36.71 

 43.43 

 36.56 

 21.73 



20.12 



32.49 

 44.39 

 44.29 

 43.79 



56.80 

 M.30 

 52.77 

 52.86 

 54.34 

 54.32 

 53.91 

 87.87 



97.11 

 95.78 

 99.11 

 97.54 

 16.18 

 34.84 

 48.63 



41.89 

 44.33 

 36.01 

 40.49 

 43.82 

 43.24 

 43.73 

 6.93 



Trace 



1.53 

 0.36 

 0.76 

 12.01 

 26.35 

 1.42 



0.05 

 Trace 



0.10 

 Trace 



aincludes (FeMnjCOs. 



N. B.— Blank space 



b Complete analysis in Table V. 

 1 above table denote that no tests were made. 



RE5IARKS ON TABLE VI. 



The above figures for calcium aud magnesium carbonates have been calculated 

 from tbe lime aud magnesia actually found. With exception of two numbers indicated 

 by b, tbe chlorine was determined only qualitatively and noted as " trace," although 

 generally present in quantity sufficient for estimation. 



Table VII. — Ser2>entine and amphibole froin dolomitic limestones. 



a By difference. 



I. A layer of pure serpentiDe on limeatoue from east aide of Red Amphitheater, Buckskin gulch, Park County. 

 n. Limestone thoroughly impregnated with serpentine, producing .1 light-yellow rock. No pyroxene or amphihole 

 ▼Isible under the microscope. Same locality. 



III. Amphibole with some pyroxene from limestone containing serpentine. Same locality. 



