Age Determination of Young Rocks and Artifacts. Physical and by Günther A. Wagner PDF

By Günther A. Wagner

ISBN-10: 3642083315

ISBN-13: 9783642083310

ISBN-10: 3662036762

ISBN-13: 9783662036761

The Quaternary, which spans nearly the final 2 million years, is characterised by means of dramatic environmental adjustments, generally called the "ice age". in this interval, guy along with his manifold cultures developed. makes an attempt at courting those occasions as appropriately as attainable have made nice growth. The wide spectrum of actual and chemical courting tools, now on hand for courting human artifacts and Quaternary rocks, is changing into more and more tricky to know. during this ebook a number of the chronometric ideas are comprehensively and intelligibly taken care of. via various case stories, taken from archaeology and Quaternary geology, the aptitude and difficulty of those suggestions are validated. The publication is meant frequently for scientists and scholars of those fields, however the layman can also locate its profitable.

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Extra resources for Age Determination of Young Rocks and Artifacts. Physical and Chemical Clocks in Quaternary Geology and Archaeology

Example text

As a secondary deposition, they cement preexisting materials, such as sand, gravel or soils. They occur more or less parallel to the surface. During the formation of the calcium carbonate, uranium is preferably incorporated and fractionated from thorium. This allows the application of 2 3°Thf234 U dating (Sect. 1). Since the carbon in the calcium carbonates « 40 ka) that precipitated from the groundwater derives partly from the atmospheric and biospheric reservoirs, 14C dating (Sect. 4) is applicable.

In central Europe, there are two such divisions, one with four alpine glaciations (GUnz, Mindel, Riss and WUrm) and one with three Nordic glaciations (Elster, Saale and Weichsel). Their mutual correlation is still problematic. The main 28 2 Materials obstacles to such correlation are frequent time gaps as well as multiple facies changes over short distances in the sedimentary record of Quaternary deposits (Fig. 6). The continuously deposited deep-sea sediments reveal considerably more climatic cycles compared to the continental deposits, and allow worldwide correlation across all oceans.

For the tectonic development of rocks and, in particular, the evaluation of earthquake recurrence intervals in seismically active regions, age determination of such fractures is essential. The ESR dating (Sect. 3) of mylonite (1 ka -1 Ma) exploits the pressure sensitivity of the ESR signals in quartz. If the mylonitization process is associated with a strong temperature increase, a glass-like rock mass forms, the so-called pseudotachylite, which is known from the friction plains of big mountain slides, for example in the Alps and the Himalayas.

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Age Determination of Young Rocks and Artifacts. Physical and Chemical Clocks in Quaternary Geology and Archaeology by Günther A. Wagner


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