 | | Report (issue) | | Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...Associated Elements in the Powderhorn District, Gunnison County, Colorado By JERRY C. OLSON and DAVID...associated elements in the Powderhorn district, Gunnison County, Colorado. (Geology and resources of... Intrusions (Geology)—Colorado—Gunnison Co. 3. Thorium ores—Colorado—Gunnison Co. I. Hedlund, David Carl...20. 21. 22. Index map of Colorado showing location of the Powderhorn district • Photomicrograph of augite |  | | Report (issue) | | INTERIOR ALKALIC ROCKS OF IRON HILL GUNNISON COUNTY, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 197-A...Paper 197-A ALKALIC ROCKS OF IRON HILL GUNNISON COUNTY, COLORADO BY ESPER S. LARSEN Shorter contributions...Hastingsite and diopside_________________-_._ Melanite __ _ _ __ --____--__-___________ Alterations of...Page PLATE 1. Geologic map of Iron Hill area, Gunnison County, Colo____---__,______-.___-___-_--___-_-_--_---___-__..._ 2 3. A, B, Pyroxenite on south side of Stone Gulch; C, Banded syenite.______________-____--_-___-__-__----_____ |
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