
	Where results make sense

Topic: Thermoluminescence dating

Related Topics

Radiometric dating

Archaeological science

Radiocarbon dating

Dendrochronology

Pleistocene

William Shakespeare

Battle of Verdun

Taisho period

Edmund Mortimer

Henry Percy, 1st Earl of Northumberland

Cordoba, Spain

Taisho emperor

In the News (Sat 12 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Dating Exhibit
		Thermoluminescence dating is used for rocks, minerals and pottery.
		Therefore, thermoluminescence dating is actually determining the last time a crystal was heated and electrons were released.
		The minerals that are used for thermoluminescence dating are quartz, feldspar, diamond and calcite.
	www.mnsu.edu /emuseum/archaeology/dating/thermoluminescence.html (402 words)

	Thermoluminescence dating - Wikipedia, the free encyclopedia
		Thermoluminescence (TL) dating is the determination by means of measuring the accumulated radiation dose of the time elapsed since material containing crystalline minerals was either heated (lava, ceramics) or exposed to sunlight (sediments).
		In thermoluminescence dating, these long-term traps are used to determine the age of materials: When irradiated crystalline material is again heated or exposed to strong light, the trapped electrons are given sufficient energy to escape.
		Thermoluminescence dating presupposes a "zeroing" event in the history of the material, either heating (in the case of pottery or lava) or exposure to sunlight (in the case of sediments), that removes the pre-existing trapped electrons.
	en.wikipedia.org /wiki/Thermoluminescence_dating (711 words)

	Controversy still rages over Glozel artifacts
		Thermoluminescence dating of Glozel pottery in 1974 confirmed that the pottery was not produced recently.
		By 1979, 39 TL [Thermoluminescence] dates on 27 artifacts separated the pottery into three groups: the first between 300 BC and AD 300 (Celtic and Roman Gaul), the second medieval, centered on the 13th century, and the third recent.
		A preliminary dating of the texts according to paleography (the science of ancient writing) and history shows that Glozel corresponds to the Iron Age Celtic period of La Tène, beginning in the third century BC, and continues through the second century AD, the Gallo-Roman period.
	www.atlantisquest.com /Controversy.html (1562 words)

	Dating Exhibit
		The first problem encountered when trying to determine the date of an ancient object is that in prehistoric times there were no written records to document the cultures of the past, so archaeologists relied on a system of relative dating to put things into context.
		In relative dating, a series of techniques are used that compares artifacts to determine which is older.
		This was the beginning of a revolution in dating and the start of absolute dating, or the determination of an actual age of an object.
	www.mnsu.edu /emuseum/archaeology/dating (168 words)

	Persia & Creation of Judaism; Book 6. Dating - Physical Evidence - (CAIS)
		One of the most reliable chronometric dating techniques is based on the fact that annual growth rings on shallow rooted trees vary in width with the amount of water available each season and with temperature fluctuations from winter to summer.
		So for older specimens, archaeomagnetic dates are determined by finding a rate of the geomagnetic field by comparing the pole location of an archaeomagnetic sample with a master curve of a polar movement constructed from an average of many independently dated samples.
		The intensity of thermoluminescence is directly related to the amount of accumulated changes produced by background radiation, which depends on the age of the sample and the amount of trace radioactive elements it contains.
	www.cais-soas.com /CAIS/Religions/non-iranian/Judaism/Persian_Judaism/book6/pt4.htm (3949 words)

	Dating Facilities - School of Earth & Environmental Sciences @ UOW (Site not responding. Last check: 2007-11-04)
		Thermoluminescence (TL) dating of sediments depends upon the acquisition and long term stable storage of TL energy by crystalline minerals contained within a sedimentary unit.
		TL dating as practised in the Wollongong laboratory may be applied to aeolian, fluvial, coastal and, in some cases, marine sediments.
		TL dating is both a costly and time consuming process and, as with most dating methods, good samples give good dates, poor samples seldom provide reliable ages.
	www.uow.edu.au /science/eesc/facilities/tl_dating.html (2302 words)

	assemblage 4 -- An Introduction to Optical Dating (review)
		The prologue serves to establish the position of optical dating in relation to other absolute dating techniques, and this is followed by two introductory chapters which outline the basic principles behind luminescence dating and the nature of the ionising radiation responsible for the accumulation of the luminescence signal.
		The fairly short history of optical dating, allied to the complexity of the technique and subject materials, means that the technique still remains in a state of flux, something reflected in the fact no optimum method is cited.
		As the scope of optical dating expands to incorporate sediments from ever more diverse environments, the importance of dating partially bleached material is likely to grow, and the inclusion of a chapter on the subject is essential.
	www.shef.ac.uk /assem/4/4aitken.html (1219 words)

	003Sample (Site not responding. Last check: 2007-11-04)
		Thermoluminescence dating is also based on the idea of radioactive decay but tracks the amount of radiation received by an object.
		The science behind potassium argon dating is the same as the science that underlies the radiocarbon method.
		Thermoluminescence would be used to date the ceramics because ceramics are not organic but do have a crystal matrix that can be dated by these means.
	titicaca.ucsb.edu /cotahuasi/courses/anth3/003Samplequestion.htm (573 words)

	Thermoluminescence dating
		Thermoluminescence dating is the determination of the date at which materials were formed by measuring the light energy released when heating it.
		The natural flux of ionizing radiation - both from cosmic radiation as well as natural radioactivity - can put crystalline structures in excited states storing some of the energy of the radiation.
		When such material is heated the stored energy is released as weak light, the so called thermoluminescence.
	www.ebroadcast.com.au /lookup/encyclopedia/th/Thermoluminescence_dating.html (124 words)

	Potassium-Argon Dating
		Dates obtained with this method then indicate that the archaeological materials cannot be younger than the tuff or lava stratum.
		Because the materials dated using this method are NOT the direct result of human activity, unlike radiocarbon dates for example, it is critical that the association between the igneous/volcanic beds being dated and the strata containing human evidence is very carefully established.
		Potassium-argon dating is accurate from 4.3 billion years (the age of the Earth) to about 100,000 years before the present.
	id-archserve.ucsb.edu /Anth3/Courseware/Chronology/09_Potassium_Argon_Dating.html (582 words)

	Thermo luminescence, thermoluminescence dating of pottery
		By the mid-1960’s, its validity as an absolute dating technique was established by workers at Oxford and Birmingham in England, Riso in Denmark, and at the University of Pennsylvania in the U.S..
		While not so accurate as radiocarbon dating, which cannot date pottery (except from soot deposits on cooking pots), TL has found considerable usefulness in the authenticity of ceramic art objects where high precision is not necessary.
		When dates of a number of shards associated together are averaged, the error is reduced typically to 7-10 per cent.
	www.antiquesndynasties.com /dating_pottery.htm (885 words)

	Antique dealers turn to physics (April 2002) - Physics World - PhysicsWeb
		This form of "luminescence testing" is used in archaeology to date burnt flint and materials that have been "fired" in a kiln, such as pottery.
		Previous luminescence dating involved crushing the material to find large grains of quartz, and also required knowledge of the prevalent local radiation levels for accurate measurements.
		Thermoluminescence dating is essentially a measure of the radiation to which the ceramic has been exposed since it was fired.
	www.physicsweb.org /article/world/15/4/3 (918 words)

	Section IV: How to Collect Samples for TL and OSL Dating (Site not responding. Last check: 2007-11-04)
		The usual method is to date both polymineralic fine-grains (4 to 11 µ) and quartz coarse-grains (100-200 µ), thus combining TL ages.
		Dating was by means of OSL using 90-120 µ quartz.
		Linear growth is usually observed and high temperatures associated with the formation of friction melts during the intense fault movements are usually enough to reset the TL signal in the quartz and feldspar relics.
	crustal.usgs.gov /laboratories/luminescence_dating/section4.html (3669 words)

	Thermoluminescence dating (Site not responding. Last check: 2007-11-04)
		Thermoluminescence dating is the determination of the date at which materials were formed by measuring thelight energy released when heating it.
		Thermoluminescence dating is used for material where radiocarbondating is not available, like sediments.
		Its use is now common in the authentication of old ceramic wares, for which it givesthe approximate date of the last firing.
	www.therfcc.org /thermoluminescence-dating-771.html (151 words)

	Bibliography
		Chen, X.Y. (1995) Geomorphology, stratigraphy and thermoluminescence dating of the lunette dune at Lake Victoria, western New South Wales.
		Mercier, N., Valladas, H. and Valladas, G. (1995) Flint thermoluminescence dates from the CFR laboratory at Gif: contributions to the study of the chronology of the Middle Palaeolithic.
		Berger G.W. and Busacca A.J. Thermoluminescence dating of late Pleistocene loess and tephra from eastern Washington and southern Oregon and implications for the eruptive history of Mount St Helens.
	clrwww.in2p3.fr /Tl/Ancienttl/BiblioWintle.htm (12563 words)

	K-12
		Dating material from the archaeological or geological record beyond 30 000 years can be very difficult indeed unless the depositional situation of the sample is favourable and scientists can remove any contamination.
		There was close agreement between the radiocarbon dates and the dates which had been estimated using the writing styles used on the scrolls, and in some cases the dates recorded on the scrolls themselves.
		Radiocarbon dating is one of the critical discoveries in 20th century science and it provided one of the most important tools for archaeologists in their quest to uncover the past.
	www.c14dating.com /k12.html (2794 words)

	American Antiquity: Correspondence in tree-ring and thermoluminescence dating: A protohistoric Navajo pilot study. ... (Site not responding. Last check: 2007-11-04)
		American Antiquity: Correspondence in tree-ring and thermoluminescence dating: A protohistoric Navajo pilot study.
		Correspondence in tree-ring and thermoluminescence dating: A protohistoric Navajo pilot study.
		Dating of early Navajo residence and special use sites, ca.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:83667782&refid=ip_encyclopedia_hf (207 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		Thermoluminescence dating of the Jinmium site in the Northern Territory suggested a date of 200,000 BP.
		Debenham, N., 1998 Thermoluminescence Dating of Sediment from the Calico Site (California) (CAL1), Quaternary TL Surveys, Nottingham, United Kingdom, 1998.
		Unlike hermeneutic evidence, there are very few issues with archaeological evidence, primarily due to the relative reliability of Carbon-14 and Thermo-luminescence dating.
	www.worldhistory.com /wiki/T/Thermoluminescence-dating.htm (123 words)

	Thermoluminescence dating - One Language (Site not responding. Last check: 2007-11-04)
		The natural flux of ionizing radiation— both from cosmic radiation and from natural radioactivity—can put crystalline structures in excited states, storing some of the energy of the radiation.
		When such material is heated, the stored energy is released as weak light (luminescence), the so-called thermoluminescence.
		After cooling, re-heating of the material will not generate light, as no excited states remain.
	www.onelang.com /encyclopedia/index.php/Thermoluminescence_dating (182 words)

	Thermoluminescence Testing
		The Limits of TL Thermoluminescence dating of a ceramic requires two steps.
		Buried terra cottas are irradiated by radioelements in the objects themselves and by those in the soil in which they are buried.
		Thermoluminescence tests are an important factor when dealers and collectors judge authenticity.
	www.coupdefoudre.com /CurrentArticle/Thermo.html (687 words)

	Mexican prehispanic ceramic dating by thermoluminescence method
		The first dating methods were based on historical narrations and style of buildings manufacture techniques.
		The thermoluminescence technique is the only physical way for determining the absolute age of pottery presently available.
		Thermoluminescence (TL) is the emission of light when a substance is heated at temperatures lower than its incandescence temperature.
	www.scienzaonline.com /archeologia/thermoluminescence.html (1843 words)

	TL dating - history
		The phenomenon of the thermoluminescence of minerals was known empirically as early as 1663.
		But this was not sufficient to be used as a dating method; it was necessary to link the intensity of this flash to a time scale.
		It was only three centuries later that the first law of thermoluminescence was established: the thermoluminescence of minerals is roughly proportional to the irradiation to which they have been exposed.
	ngd.kvi.nl /dating/tl/history.shtml (154 words)

	Scientific Theology--The Pentateuch, Part 3 (Site not responding. Last check: 2007-11-04)
		Of the dating methods which have been discussed, potassium/ argon dating of basalts is slightly in favor of a short chronology, rubidium/strontium dating is against a long chronology, and the others are not much help in either direction, with the exception of uranium/lead dating, in which the data reported by Gentry et al.
		Fission-track dating and K-Ar dating indicate that the age of apatite from Cerro de Mercado, Mexico, is 30 m.y., in contradiction to previous corrected fission track ages of 40 and 57 my.
		One of the apparently repeating phenomena noted in amino acid dating is the decreasing of the racemization “constant” in older specimens.
	www.scientifictheology.com /STH/Pent3.html (10213 words)

	Asian Art - E&J Frankel, New York
		Thermoluminescence (TL) testing scientifically determines the age of an object by taking a physical sample, which is then induced to emit luminescence by non-intrusive laser heating.
		Thermoluminescence testing is only useful for objects that have been fired in a kiln (i.e., ceramics).
		Test papers can be provided upon request.Many institutions perform thermoluminescence testing, but the most widely accepted ones are Oxford Authentication Laboratories (Oxford, England) and YSS Lab For Thermoluminescence Dating of Ancient Ceramics (The Chinese University, Shatin, Hong Kong).
	www.ejfrankel.com /faqs.asp (1052 words)

	FURTHER CONSTRAINTS ON AGE DATING OF LATE-PLEISTOCENE AND HOLOCENE COASTAL DUNES AND SPODOSOL CHRONOSEQUENCES FROM THE ... (Site not responding. Last check: 2007-11-04)
		Preliminary dating of stabilized coastal dunes in the Oregon Dunes National Recreation Area (ODNRA) of the central Oregon coast indicated a late-Pleistocene (24-70 ka) origin of the dunes (Beckstrand, 2000).
		The next oldest date is from the southern end of the Florence Dune Sheet (SP1 45,300±3100 TLYBP) where a 3 m thick Bt horizon implied an old dune age within 1.4 km of the modern coast.
		The new TL dates confirm the importance of cementation of the B horizon in constraining relative dune age.
	gsa.confex.com /gsa/2002CD/finalprogram/abstract_34819.htm (581 words)

	Archaeology Wordsmith (Site not responding. Last check: 2007-11-04)
		Heating of the pottery causes the electrons and holes to be released from the traps, and they recombine in the form of thermoluminescence.
		The amount of thermoluminescence from a heated sample is used to determine the number of trapped electrons resulting from the absorption of alpha radiation.
		It overlaps with radiocarbon in the time period for which it is useful, spanning 50,000-300,000 years ago, but also has the potential for dating earlier periods.
	www.reference-wordsmith.com /cgi-bin/lookup.cgi?category=&where=headword&terms=thermoluminescence (251 words)

Try your search on: Qwika (all wikis)