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Description of dinoflagellate wall layers from the Upper Hauterivian (Cretaceous) of a claystone-marlstone succession in the clay-pit Frielingen (2013)

Weinkauf, Manuel F G ; Keupp, Helmut ; Mutterlose, Jörg

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Publication Date: 2024-04-29

Keywords: Dinoflagellates, calcareous, wall thickness; Dinoflagellates, calcareous, wall thickness, inside; Dinoflagellates, calcareous, wall thickness, outside; Dinoflagellates, one wall-layer; Dinoflagellates, two wall-layers; Event label; Frielingen; Germany, Lower Saxony; Latitude of event; Longitude of event; Sample ID

Type: Dataset

Format: text/tab-separated-values, 150 data points

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Microbial carbonate crusts - a key to the environmental analysis of fossil spongiolites? (2018)

Keupp, Helmut ; Jenisch, Angela ; Herrmann, Regina ; [et al.]

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Publication Date: 2021-04-25

Description: Morphological and geochemical comparisons between modern cryptic microbialites from Lizard Island/Great Barrier Reef and fossil counterparts in the Upper Jurassic (Southern Germany, Dobrogea/Romania) and late Lower Cretaceous (Aptian/ Albian from Cantabria/Spain) spongiolitic environments show that there are common factors controlling the crust formations mostly independent of light despite of diverging (paleo-) oceanographic positions as well as relationships of competitors. Factors such as increased alkalinity ,oligotrophy, and reduced allochthonous deposition are of major importance. Thrombolitic microbialites are interpreted as biologically induced and therefore calcified in isotopic equilibrium with the surrounding sea water. Corresponding with shallowing upward cycles, microbial mats which produce stromatolitic peloidal crusts become more important. Different biomarkers are introduced for the first time extracted and analyzed from spongiolitic limes tones ofLower Kimmeridgian age from Southern Germany.

Keywords: Paläontologie: Allgemeines ; 551 ; VU 000 ; 38.20 ; 38.2

Language: English

Type: article , publishedVersion

Format: application/pdf

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