Zobrazeno 1 - 7 of 7 pro vyhledávání: '"Nelson R. Shaffer"'
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They Have a Rock That Bleeds: Sunrise Red Ochre and its Early Paleoindian Occurrence at the Hell Gap Site, Wyoming
Autor: George C. Frison, Kenneth B. Tankersley, Michael D. Stafford, Nelson R. Shaffer, JohnS Benz, Kevin O. Tankersley, George M. Zeimens, F. Rudolf Turner, Marc D Hess
Publikováno v: Plains Anthropologist. 40:185-194
Etude portant sur l'extraction de l'ematite de terre, plus connue sous le nom d'Ocre rouge lever du soleil, par les premiers indiens sur le site de Powars II. Les proprietes chimique de cette ocre ont ete compare a celle de l'ocre rouge des niveaux p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04185796b1498608f119d6971cff5b2b
https://doi.org/10.1080/2052546.1995.11931771
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4
Distribution and geochemical characteristics of metal enrichment in the New Albany Shale (Devonian-Mississippian), Indiana
Autor: Nelson R. Shaffer, Edward M. Ripley, Mark S. Gilstrap
Publikováno v: Economic Geology. 85:1790-1807
Black shale beds in the uppermost part of the Clegg Creek Member of the New Albany Shale (Devonian-Mississippian) in southern Indiana have organic C contents from approximately 12 to 25 wt percent and are enriched in Cu, Pb, Zn, Ni, Cd, Mo, and V. Br
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86d6ff6f3e2bdbb79f95b02938680799
https://doi.org/10.2113/gsecongeo.85.8.1790
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5
The Time of Sands: Quartz-rich Sand Deposits as a Renewable Resource
Autor: Nelson R. Shaffer
Publikováno v: Shaffer, Nelson R.(2006). The Time of Sands: Quartz-rich Sand Deposits as a Renewable Resource. Electronic Green Journal, 1(24). Retrieved from: http://www.escholarship.org/uc/item/6m743258
Electronic Green Journal, vol 1, iss 24
What is sand, where it originates, some of its many uses, its importance as a natural resource that helps build our society, and its renewable nature.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3da85dd29dd02381f7c5f184336ee0f3
http://www.escholarship.org/uc/item/6m743258
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6
Regional variation of 87Sr/86Sr ratios and mineral compositions of sediment from the Ross Sea, Antarctica
Autor: Nelson R. Shaffer, Gunter Faure
Publikováno v: Geological Society of America Bulletin. 87:1491
The 87 Sr/ 86 Sr ratios and concentrations of rubidium and strontium of 87 Sr/ 86 Sr: 0.710 to 0.726; Sr = 91 to 238 ppm, Rb = 56 to 158 ppm. These data are interpreted in terms of two-component mixing of weathering products of old sialic rocks (high
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eabba46f3123ead8cabec28db61250b8
https://doi.org/10.1130/0016-7606(1976)87<1491:rvosra>2.0.co
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7
Sulfur-isotope variations in Pennsylvanian shales of the midwestern United States
Autor: Raymond M. Coveney, Nelson R. Shaffer
Publikováno v: Geology. 16:18
Conditions of sedimentation have affected isotopes in coarse-grained sulfides from Pennsylvanian shales. For example, the Mecca Shale Member (Desmoinesian Series) contains highly variable values for ..delta../sup 34/S (approx. = -10 per thousand, ..s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3cacfe7c6adc4e219198ca743b532e22
https://doi.org/10.1130/0091-7613(1988)016<0018:sivips>2.3.co
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