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Sánchez Beristain, Juan Francisco [Author]

Paeloecological and geochemical studies on sponge/microencruster-bearing communities contained in selected Cipit Boulders from the St. Cassian Formation (Lower Carnian, Upper Triassic) of the Dolomites, northeastern Italy = Paläoökologische und geochemische Studien auf Schwamm-Mikroinkrustrierer- Gemeinschaften ausgewählter Cipit Kalke aus der St. Cassian Formation (Unterkarn, Obertrias) von der Dolomiten, Nordostitalien

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  • Media type: E-Book; Thesis
  • Title: Paeloecological and geochemical studies on sponge/microencruster-bearing communities contained in selected Cipit Boulders from the St. Cassian Formation (Lower Carnian, Upper Triassic) of the Dolomites, northeastern Italy
  • Parallel title: Paläoökologische und geochemische Studien auf Schwamm-Mikroinkrustrierer- Gemeinschaften ausgewählter Cipit Kalke aus der St. Cassian Formation (Unterkarn, Obertrias) von der Dolomiten, Nordostitalien
  • Contributor: Sánchez Beristain, Juan Francisco [Author]
  • imprint: 2010
    Online-Ausg.
  • Extent: Online-Ressource (PDF-Datei: 225 S., 37.040 KB)
  • Language: English
  • Identifier:
  • Keywords: Dolomiten > Obertrias > Fossile Schwämme > Biomarker
    Riffkalk > Karnium > Mikrofazies > Palökologie > Schwämme > Biogeochemie
  • Type of reproduction: Online-Ausg.
  • Reproduction note: Langzeitarchivierung gewährleistet
  • Origination:
  • University thesis: Göttingen, Univ., Diss., 2010
  • Footnote:
  • Description: The Lower Carnian St. Cassian Formation (Dolomites, NE Italy) is well known for its very diverse and exceptionally well-preserved fauna. It dates from Middle to Late Triassic and comprises basin sediments deposited between carbonate buildups and local back reef areas. The degree of preservation is highest in the well-known Cipit Bouldersʺ. These calcareous masses are mostly limestones derived from the Cassian carbonate platforms, which during emersion and karstification underwent complete lithification and extensive solution, and subsequently slid from the platform margins into the Cassian basin. They have been subject of diagenetic, paleogeographic, taxonomic, and most lately, geochemical studies. However, most works dealing with them focus on the taxonomy of reefal fauna. This unfortunately also applies to most publications concerning Triassic reef and reef-like environments. Recent studies have shown that biofacies can differ considerably between different boulders. The outstanding preservation state of selected boulders allows taxonomical determination of most of their biomorpha. 112 thin sections from Cipit Boulders from the localities of Seelandalpe and Misurina were selected for microfacies and statistical analysis. Six species of microencrusters were found (Koskinobullina socialis, Girvanella sp., Tubiphytes cf. obscurus, Terebella lapilloides, Reptonoditrypa cautica,and Baccanella floriformis). These species represent an effective tool for paleoenvironmental intepretation due to their size and paleoecology ...
  • Access State: Open Access