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  • ddc:562  (4)
  • 551.7  (3)
  • German  (7)
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  • German  (7)
  • Bulgarian
  • Chinese
  • English  (5)
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  • 2015-2019  (4)
  • 2000-2004
  • 1985-1989  (3)
  • 1965-1969
  • 1945-1949
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  • 1
    Publication Date: 2021-05-06
    Description: Remarkable polygenetical structures were observed at a refinery rehabilitation site in Wedel/Holstein. The polygonal shaped, channel-like structures are incised in mid-Saalian clayey, chalk-rich till. They are symmetrically semicircular shaped and filled with calcareous, silty sands that can be interpreted as sandy reworked till with aeolian components. The width reaches from approx. 0.3 to 1.5 metres, the depth up to approx. 0.8 metres. Horizontal cracks up to more than 10 meters in lengths, occurring as narrow belts of sand with reddish colour, are often centrally aligned in the channel-like structures. The present-day red colour is not natural but related to pollution. These belts reach down to the bottom of the channel like structures. At the lower site of the channel-like structures glacitectonic fissures with a width up to a few centimetres were to be traced into a depth of several metres to the basis of the excavat ion. The genesis of the channel-like structures is discussed. e. g. a possible relation with the pre-existing glacitectonic joints resp. the expected periglacial paleohydrogeological setting.
    Description: research
    Keywords: 551.7 ; periglacial channels ; Weichselian periglacial ; frost wedges ; glacitectonism ; paleohydrogeology ; talik ; Elbe spillway
    Language: German
    Type: article , Verlagsversion
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  • 2
    Publication Date: 2021-05-06
    Description: C/O-stable isotope composition (VPDB) of speleothems from the Makkaronihalle of the Hüttenbläserschacht Cave in Iserlohn shows a clear separation between glacial and interglacial calcites. In contrast to normal speleothems (stalagmites, excentriques, crystals in cave ponds, draperies; δ18O: –4.0 to –6.1 ‰, δ13C: –4.9 to –10.9 ‰), rhombohedral crystal sinter and spherulitic speleoparticles are characterised by lower δ18O (–8.9 to –17.9 ‰) and higher δ13C values (+0.7 to –6.1 ‰). This suggests that these speleogenetic particles were formed in slowly freezing waterpools on ice during the transition from a stadial to an interstadial phase. Precise 230Th/U-dating shows younger Weichselian ages of 28.6 to 33.0 ka for these speleogenetic particles from north-west Germany. These formation periods indicate freezing conditions overlain by 34 m of hostrock and provide the minimum depth of permafrost penetration for the younger Weichselian in the area of the northern Sauerland (north-west Germany).
    Description: research
    Keywords: 551.7 ; permafrost ; Cryogenic calcites ; C/O isotopes ; Upper Weichselian ; ice caves ; north-western Germany
    Language: German
    Type: article , Verlagsversion
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  • 3
    Publication Date: 2021-05-06
    Description: On the basis of the work done by Strahl et al. (1994), the mollusc specimens in the Late Saalian glacial and Eemian interglacial sediments from the cliff outcrop of Klein Klütz Höved (NW Mecklenburg) were re-examined and, in the process, a few vertebrates (fishes, micromammals) were also found. The mollusc specimens from the Late Saalian sand and mud alone comprise approximately 40 species among which terrestrial varieties, e.g. Succinella oblonga, Pupilla loessica, P. pratensis, Vallonia tenuilabris or Vertigo genesii, are clearly predominant as far as the number of individual specimens is concerned. Among the limnic varieties were also found the glacial index species Pisidium obtusale f. lapponicum and P. stewarti. It was also possible to prove the northern-most presence for Germany of the steppe lemming Lagurus lagurus in the Late Saalian. In the Eemian mud, the molluscs found were almost exclusively limnic. This about 20 species comprising fauna is characte-ristic of a river system with calmer areas, oxbow lakes and in-coming springs. These fluvial conditions were confirmed by the freshwater bivalves Pisidium amnicum, P. supinum, P. moitessierianum, P. ponderosum and Unio tumidus. For the first time in Mecklenburg-Western Pomerania, evidence was found of the spring snail Belgrandia germanica as an interglacial index species. The limnic-fluvial section of the Eemian is topped by a cryoturbate structures. Its sandy, gravelly pockets contain marine molluscs. The index species for the marine Eemian found in the southern Baltic region are Polititapes senescens and Bittium reticulatum.
    Description: research
    Keywords: 551.7 ; molluscs ; Saalian deposits ; limnic and marine Eemian facies ; Belgrandia germanica ; micromammals ; Lagurus lagurus ; Mecklenburg-Western Pomerania
    Language: German
    Type: article , Verlagsversion
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  • 4
    Publication Date: 2022-07-08
    Description: Die Mikrofauna der am Bubenheimer Berg bei Koblenz anstehenden tertiären Sedimente wird beschrieben. Aufgrund ihrer Ostrakoden-Fauna können die Ablagerungen dem Unteroligozän zugeordnet werden. Der Meeresvorstoß in das Neuwieder Becken erfolgte vermutlich aus dem Bereich Oberrheingraben - Mainzer Becken und überflutete dabei Teile des Rheinischen Schiefergebirges.
    Description: Abstract: The microfauna of the tertiary deposits from Bubenheim near Koblenz (Neuwied Basin, Germany) is described. The sediments are dated as Lower Oligocene according to the ostracod fauna. The marine ingression into the Neuwied Basin probably came from the Oberrheingraben - Mainz Basin area and overflowed parts of the Rhenish Massif.
    Description: research
    Keywords: ddc:562
    Language: German
    Type: doc-type:article , publishedVersion
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  • 5
    Publication Date: 2022-08-02
    Description: Mit Hilfe taphonomischer Befunde wird das Häutungsverhalten der Trilobiten Aulacopleura (Paraaulacopleura) n. sp., Cyphaspides n. sp., Chotecops sollei Struve, 1984 und Kettneraspis sp. aus dem Steinbruch “Gutenacker“ sowie Diademaproetus n. sp., Rhenocynproetus n. sp., Cyphaspis spp., Harpes sp., Acastoides n. sp., Destombesina n. sp., Barrandeops n. sp., Kettneraspis seiberti Basse, 2004, Leonaspis kleini Basse, 2004 und Koneprusia spp. von der Fundlokation “Heckelmanns Mühle” beschrieben. Beide Örtlichkeiten befinden sich im Rupbachtal, einer bekannten Fund - region für fossile Faunen aus dem Unter-/Mitteldevon-Grenzbereich. Innerhalb der verschiedenen Trilobitenarten sowie innerartlich wurden hierin eine Vielzahl verschiedener Häutungsmodi nachgewiesen. Der Nachweis infaunaler Häutungen erklärt womöglich das Vorkommen unzerstörter Häutungsensembles in den hiesigen Schlammströmen (Lahars). Diese endobenthischen Häutungen lassen sich an bestimmten Häutungskonfigurationen erkennen. Dazu wird neben den bisher bekannten Mustern hier zusätzlich der „Akkordeon-Effekt“ eingeführt. Den in einigen Odontopleuridae besonders ausgebildeten vorderen Randanhängen der Pleuren wird eine Verankerungsfunktion zur Unterstützung des Häutungsvorgangs zugeschrieben. Mit der „Anker-Strategie“ wird eine spezielle Häutungsweise bei Arten mit ankerförmigem Cephalon, wie z. B. Diademaproetus, für möglich gehalten und beschrieben. Innerhalb der Fauna von „Heckelmanns Mühle“ folgten Häutungen eher individuellen Rhythmen während in „Gutenacker“ Ansammlungen von Häutungsresten auf zeitlich koinzidierende Häutungsevents hinweisen. Der letztere Lebensraum wurde offenbar von manchen Arten speziell zur Häutung aufgesucht.
    Description: Abstract: Some molting-habits and related taphonomic implications of the trilobites Aulacopleura (Paraaulacopleura) n. sp., Cyphaspides n. sp., Chotecops sollei Struve, 1984 and Kettneraspis sp. from the “Gutenacker” quarry such as Diademaproetus n. sp., Rhenocynproetus n. sp., Cyphaspis spp., Harpes sp., Acastoides n. sp., Destombesina n. sp., Barrandeops n. sp., Kettneraspis seiberti Basse, 2004, Leonaspis kleini Basse, 2004 and Koneprusia spp. from the “Heckelmanns Mühle” fossil site are described. Both sites are situated in the Rupbach-valley in the south-eastern part of the Rhenish Massif, known for its numerous transitional Lower/Middle Devonian faunas. The variety of supposed molt procedures was high both extra- and intraspecifically. Infaunal molting occurred in some cases and may explain the occurrence of moult ensembles inside of some debris flows (lahars). Infaunal molting can be recognized by typical molting configurations as according to previous work and/or the “accordion-effect”, introduced herein. The function of specific anterior pleural spines, developed in some Odontopleuridae is interpreted as an auxiliary means for exuviation. An “anchor molt strategy” is considered possible and described for species with anchor-shaped cephala, especially Diademaproetus. In the “Heckelmanns Mühle”-fauna molting rather followed individual rhythms whereas in “Gutenacker” clustered molt remains are indicative of synchronized molting events. The latter site was apparently frequented especially for exuviation by some species.
    Description: research
    Keywords: ddc:562
    Language: German
    Type: doc-type:article , publishedVersion
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  • 6
    Publication Date: 2023-01-20
    Description: Abstract: Besides the condrichthyan fishes the present contribution deals with the rarer invertebrate groups in the "Pre-Aquitanian" of the Mainz Basin, with lists on taxonomic data, stratigraphic occurrences and sites.
    Description: research
    Keywords: ddc:562 ; Mainzer Becken ; Tertiär ; Invertebraten
    Language: German
    Type: doc-type:article , publishedVersion
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  • 7
    Publication Date: 2023-12-06
    Description: Der Rest eines hybodontoiden Euselachiers aus dem Unterrotliegenden (Unterperm) der Pfalz (SW-Deutschland) wird beschrieben. Platte und Gegenplatte zeigen einen gedrungenen, gekrümmten Stachel einer vorderen Dorsalis mit Stützplatfe, einen schlanken, ebenfalls gebogenen Stachel der hinteren Dorsalis mit Stützplatte, das basipterygoidale Skelett und vermutlich dreieckige Beckenflossen, die durch einfache, ungeteilte Radialia gestützt sind. Placoidschuppen sind vorhanden.
    Description: Abstract: The fragment of a hybodontoid euselachian shark out ot the Lower Rotliegend (Lower Permian) of the Palatinate (SW-Germany) is described. Specimen and counterpart show a short and curved spine of afore-most dorsal fin with joisting cartilage plate and a slender also curved spine of the posterior dorsal fin with cartilage plate, the basipterygoid skeleton and possibly triangle pelvic fins that are joisted by short undivided radials. Placoid scales are existing.
    Description: research
    Keywords: ddc:562 ; Rotliegend ; Pfalz ; Fische
    Language: German
    Type: doc-type:article , publishedVersion
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