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Published byThomasine Watkins Modified over 7 years ago
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CONTRIBUTIONS FROM THE ARCHAEOLOGICAL SCIENCES Timeline The Site The Artifacts The People
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RADIOACTIVE DATING MethodRange (years) Carbon-1450-70,000 Potassium/Argon100,000-open Uranium-238/Thorium-2305,000-500,000
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CALIBRATION PLOT
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RADIATION DAMAGE Thermoluminescence (TL) (recent- 500,000 BP): electrons freed by high energy particles and trapped; requires ancient firing Electron spin resonance (recent- 10,000,000 BP: carbonate matrices Fission track (recent-1,000,000,000 BP): glassy materials with uranium
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METROPOLITAN MUSEUM’S HORSE
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SITE PROSPECTION Resistivity Magnetic Electronmagnetic Ground penetrating radar Chemical
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MAGNETIC SURVEY OF AN ENGLISH CHURCH SITE
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STOKKERUPP SITE (DENMARK)
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ARTIFACT ANALYSIS Conservation Provenance of raw materials (trade routes) Technology of manufacture Economics
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PROVENANCE Inorganic analysis (elemental profiles) Isotopic analysis Carbon functionalities
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MATERIALS THAT CAN BE PROVENANCED Marble Obsidian Quartzite/sandstone Flint Soapstone Copper Clay/pottery Glass Leaded glass Leaded alloys Amber Jet
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FLINT MINING SITES IN WESTERN EUROPE
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GRIMES GRAVES
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CLASSICAL MARBLE (CRAIG AND CRAIG)
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PROBLEMS All raw material sources must be sampled. All sources must have different profiles. Technology cannot alter the profile. Alteration cannot occur during burial.
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ANCIENT TECHNOLOGY Dyes and pigments Pottery Glass Metals
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EGYPTIAN AND MAYA BLUE
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THE BLUES OF ANTIQUITY Azurite (2CuCO 3 ·Cu(OH) 2 ) Cobalt blue (CoO·Al 2 O 3 ) Lapis lazuli or ultramarine (FeS silicates) Egyptian blue (2500 BC) CuO·CaO·4SiO 2 (coprorivaite) Sand + CaCO 3 + malachite + flux Maya blue (1000 AD) Indigo vegetable + white clay Resistive to redox agents, acid, base, heat
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POTTERY TECHNOLOGY Types of clay Structure of slip or glaze Cause of color Firing temperature Firing atmosphere
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GLASS TECHNOLOY Former (silica) Modifiers (soda-lime, potash, lead) Color and opacity Cameo glass (Portland vase) Dichroic glass (Lycurgus cup)
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LYCURGUS CUP
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METAL TECHNOLOGY Alloy (bronze, brass) Fabrication (cast, worked, joining) Decoration Smelting and refining
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ORGANIC TECHNOLOGY Food and drink Fibers and textiles Asphalt, tar, and pitch Amber, jet, lacquer Rubber Dyes
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GAS CHROMATOGRAM OF FOOD RESIDUE
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MESOAMERICAN RUBBER 4000 years old Latex from the Castilla elastica tree Juice from the morning glory vine Ipomoea alba Rubber balls for pelote (artifacts from Manatí (Oaxaca, Mexico) and the cenote of Chichén Itzá (Yucatán, Mexico) Rubber bands for hafting and decoration Hosler, Burkett, and Tarkanian, Science, 2000
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ANALYSIS OF HUMAN REMAINS Soil analysis Bone analysis (isotope, elements) Bodies and coprolites (natural products) Amino acid dating DNA
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CARBON ISOTOPES IN BONE Ratio of 13 C to 12 C is determined by food source and metabolism. 13 C/ 12 C(ppt)ClassFood -26.5C 3 plantstrees, shrubs, temperate grasses -12.5C 4 plantsmaize, savannah grasses 0.0marinemarine Also 15 N/ 14 N (carnivore/herbivore/legumes)
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CARBON ISOTOPES OF WOODLAND INDIANS IN ILLINOIS
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