Geology and Mineral Deposits of the St. Regis-Superior Area, Mineral County, Montana, Issue 1082A reconnaissance study of the geology and mineral deposits of a part of northwestern Montana. |
Common terms and phrases
abundant adit amphibole analyses anticline argillite asbestos beds Belle Fourche Black Hills calcareous carbonized wood Carlile quadrangle Cecil County chrome chromite clayey claystone cleavage concentrates contains corundum Crook County dark-gray deposits disseminated chromite dolomitic dump Fall River formation feet long feet wide feldspar fine-grained fissile geologic grains gray Harford County inches Lakota formation lenses light-gray limestone Line district Line Pit locally lower magnesite mapped massive chromite micaceous mile minerals mines Morrison formation Mudstone Mudstone unit occur Oil Butte Osburn fault pegmatites percent Cr2O3 placer chromite probably production prospect quarry quartz quartzite reported Rock Springs samples sand sandstone sandstone unit sandy serpentine shaft shale shear Siltstone silty Singewald Skull Creek Skull Creek shale Sloway soapstone Soldiers Delight southeast stone stope stratigraphic Survey talc thick thin thin-bedded tons Trace Tyson U.S. Geol upper unit uranium valley vein Wallace formation williamsite zone
Popular passages
Page 607 - Physiography and glacial geology of eastern Montana and adjacent areas: US Geol. Survey Prof. Paper 174, 133 p. 1953. Physiography and glacial geology of western Montana and adjacent areas: US Geol.
Page 822 - ... been removed within the last few years. The quarries are comparatively shallow and indicate an occurrence of the feldspar in pockets rather than veins, although they are probably enlargements of veins, but the country rock has so disintegrated that the spar lies in the loose, disintegrated material, and the vein walls are not clearly defined. The rock is a mica schist bordering on serpentine, and some of the quarries are apparently within the serpentine area. Muscovite and biotite are quite abundant...
Page 615 - Survey on behalf of the Division of Raw Materials of the US Atomic Energy Commission.
Page 608 - Geology and silver ore deposits of the Pend Oreille district, Idaho : Idaho, Bur. Mines and Geology, Pam.
Page 828 - An Account of the Minerals at Present Known to Exist in the Vicinity of Philadelphia"; his second article (American Journal of Science and Arts, vol.
Page 542 - Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, US Government Printing Office Washington 25, DC CONTENTS Patte Abstract.
Page 830 - ... for agricultural purposes. Much of the report deals with the soils and the various natural and artificial fertilizers which may be used for their improvement. This report closes with an appendix in which the mineral resources of Maryland are briefly described. " The Second Report of Philip T. Tyson, State Agricultural Chemist, to the House of Delegates of Maryland, January, 1862," again dwells upon the importance of geological work in connection with an agricultural survey.
Page 828 - ... of this unit which formed when the land was submerged. Glacial debris overlies them. Clay deposits in the Delaware valley are part of the Columbia Formation also. 3. Reconnaissance map of the United States . . .: Scale, 1:7,000,000, US Geol. Survey, 1893. McINTOSH, FRANK K. 1. (and Mosier, McHenry). Investigation of Wood chromite mine area, Lancaster County, Pa.: US Bur. Mines, Rpt. Inv. 4383, 5 p. (#), illus., 1948. Chromite occurs in serpentine which intruded into the Glenarm series. Drill...
Page 608 - Eardley, AJ , 1951, Structural geology of North America: New York, Harper & Bros., 624 p.
Page 822 - Feldspar was quarried from four openings during the present season and there are1 not less than half a dozen other openings from which spar has been removed within the last few years. The quarries are comparatively shallow and indicate an occurrence of the feldspar in pockets rather than veins, although they are probably enlargements of veins, but the country rock has so disintegrated that the spar lies in the loose, disintegrated material and the vein walls are not clearly defined. The rock is a...