Danube glacial period

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The Danube Ice Age (also Danube Glacial or colloquially Danube Ice Age ) is a cold period of the Pleistocene . It is not included in the traditional four-part glaciation scheme of the Alps according to Albrecht Penck . The Danube Ice Age was named after the Danube by Barthel Eberl in 1930 . The Danube glaciation is the oldest glaciation in the Alps, which can also be detected outside the Iller - Lech region. The Danube glacial period was preceded by the Beaver-Danube warm period , followed by the Danube-Günz warm period .

structure

Before being carved out as a separate glacial, the deposits in question were classified in what is known as Mindel I. The delimitation of the older Biber glacial period and the more recent Günz glacial period is based on the position of the gravel surfaces, which are part of the deck ballast in the Penck sense and are called lower deck ballast.

Like all older glacials in the Alps, the Danube glaciation is difficult to grasp precisely in the glacial structure of the Alps ; According to Habbe (2007), it is likely to be roughly equated with the Menapium complex of the Dutch glacial structure ( Pinnau glacial period in northern Germany ). This assignment is not certain, but if it applies, the Danube Glaciation is to be parallelized with the oxygen isotope stage (Marine Isotope Stage, MIS) 26 and 28 and would therefore be classified in the period from about 950,000 to 1,000,000 years before today .

During the Danube glacial period, the Alpine region in particular was covered by ice, from which individual glacier tongues penetrated into the foreland. Greatly different temporal classifications based on fossils suggest that the gravel bodies interpreted as meltwater terraces emerged in several phases.

Occurrence

Remnants of the lower deck gravel from the Danube glacial period consist mostly of heavily weathered gravel from the Limestone Alps and are found mainly on high gravel areas in the Iller-Lech area; this region is also the type area . Deposits from the Danube glacial period include the Zusam slab gravel west of Augsburg and parts of the Aindlinger Platte north of Augsburg, as well as other deposits in the Iller and Mindel area and south of Memmingen (gravel from Kronburg and Hohen Rain ). Moraines from the Danube glacial period are not found in the northern Alpine foothills. Likewise, the higher floor gravel of the Irchel, consisting predominantly of dolomite , is classified in the Danube glacial, and under certain circumstances the so-called oak forest gravel in the area of ​​the Salzach Glacier also belongs to the Danube glacial.

literature

  • KA Habbe, with the collaboration of D. Ellwanger and R. Becker-Haumann: Stratigraphic terms for the Quaternary of the southern German Alpine foothills . In: T. Litt on behalf of the German Stratigraphic Commission 2007 (Ed.): Ice Age and Present / Quaternary Science Journal . tape 56 , no. 1/2 . E. Schweizerbart'sche Verlagbuchhandlung (Nägele and Obermiller), March 2007, ISSN  0424-7116 , p. 66-83 , doi : 10.3285 / eg.56.1-2.03 .
  • T. Litt et al .: The Quaternary in the Stratigraphic Table of Germany 2002 . In: Newsletters in Stratigraphy . tape 41 , no. 1-3 . Berlin, Stuttgart, p. 385–399 ( explanations; PDF file, 124 kB and table; PDF file, 182 kB ).

Web links

Individual evidence

  1. ↑ Barthel Eberl: The ice ages in the northern foothills of the Alps - their sequence, their chronology based on the recording in the area of ​​the Lech and Iller glaciers . Filser, Augsburg 1930.
  2. ↑ a b c d Habbe 2007 , p. 72 f.
  3. ↑ Lorraine E. Lisiecki, Maureen E. Raymo: A Plio-Pleistocene Stack of 57 Globally Distributed Benthic δ 18 O Records . In: Paleoceanography . tape 20 , 2005 ( PDF file; 1.1 MB ( memento from June 16, 2011 in the Internet Archive )). A Plio-Pleistocene Stack of 57 Globally Distributed Benthic δ 18 O Records ( Memento of the original from June 16, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / web.pdx.edu
  4. ^ Walter Freudenberger and Klaus Schwerd: Geological map of Bavaria 1: 500000 with explanations. 1 card + explanations + 8 supplements . 4th edition. Bavarian Geological State Office, Munich 1996, p. 238 ff .