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Turquoise Sources and Source Analysis: Mesoamerica and the Southwestern U.S.A.
Publisher Summary This chapter reviews turquoise sources and their analysis in Mesoamerica and the southwestern US context. As civilizations expand, the demand for rare resources becomes moreExpand
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Obsidian Industries and Cultural Evolution in the Basin of Mexico Before 500 B.C.
AbstractNeutron activation analysis of a large sample of obsidian artifacts from Early Horizon and First Intermediate sites in the Basin of Mexico has allowed identification of the geologic sourcesExpand
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Studies of radioactivity and heavy metals in phosphate fertilizer
The enormous utilization of phosphate rock and super phosphate derived from it have the potential of being an important factor in the contamination of aquifers with alpha emitting radionuclides andExpand
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Pedologic Assessment of Radionuclide Distributions: Use of a Radio‐Pedogenic Index
Naturally occurring radionuclides in soil profiles can provide a useful pedological tool, if their distribution can be calibrated to pedogenesis. As a first step toward such calibration, this studyExpand
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Organic storage of CO2 on the continental slope off the mid-Atlantic bight, the southeastern Bering Sea, and the Peru coast
A comparison is made of organic content, sedimentation rates derived from 14C and 210Pb analyses, 13C and 15N isotope ratios, amorphous silica, particle size, and calcium carbonate within sedimentsExpand
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The Role of Turquoises in the Ancient Mesoamerican Trade Structure
Mineral procurement is an enduring theme in both northwestern Mexico and the southwestern United States. Mining and mining settlements have given this great area much of its distinctive historicalExpand
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Long-living lotus: germination and soil {gamma}-irradiation of centuries-old fruits, and cultivation, growth, and phenotypic abnormalities of offspring.
Sacred lotus (Nelumbo nucifera) has been cultivated as a crop in Asia for thousands of years. An ∼1300-yr-old lotus fruit, recovered from an originally cultivated but now dry lakebed in northeasternExpand
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The authenticity of the ‘Vinland Map’ (Beinecke Library of Rare Books and Manuscripts at Yale University) has been challenged on both codicological and scientific grounds, the latter resulting from aExpand
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Pedogenic Fractionation and Bioavailability of Uranium and Thorium in Naturally Radioactive Spodosols
Plant uptake of radionuclides into the human food chain is one of many vectors used for calculating exposure rates and performing risk assessment. This study provides a pedogenic assessment ofExpand
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Determination of the Radiocarbon Age of Parchment of the Vinland Map
The Vinland Map, drawn on a 27.8 x 41.0 cm parchment bifolium, is housed in the Beinecke Rare Book and Manuscript Library at Yale University. In the northwest Atlantic Ocean, it shows the Island ofExpand
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