Atlas of Microbial Mat Features Preserved within the by Juergen Schieber, Pradip K. Bose, P.G. Eriksson, Santanu

By Juergen Schieber, Pradip K. Bose, P.G. Eriksson, Santanu Banerjee, Subir Sarkar, Wladyslaw Altermann, Octavian Catuneanu

Drawing on a mix of contemporary occurrences and certain historic opposite numbers, this atlas is a treatise of mat-related sedimentary beneficial properties that one might count on to work out in historic terrigenous clastic sedimentary successions. via combining smooth and old examples, the relationship is made to most likely formative approaches and the usage of those good points within the interpretation of historic sedimentary rocks.

* the 1st complete compilation of microbial mat features/structures preserved within the sliciclastic rock record
* prime quality, complete colour photos absolutely help the text
* glossy and old examples attach the formative procedures and usage of mat-related positive factors within the interpretation of sedimentary rocks

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Additional info for Atlas of Microbial Mat Features Preserved within the Siliciclastic Rock Record (Atlases in Geoscience, Volume 2)

Example text

Chthonoplastes dominant). Iron hydroxide horizon developed below the filamentous photosynthetic mat. Photo: Gisela Gerdes. (B) Deeper core section 5 to 10 cm below aerial surface. Mats enriched in organic matter appear black from ferrous iron (FeS). Lower mat horizon underlain by a ferric iron horizon. Photo: Gisela Gerdes. (C) Thin section microphotograph showing lamina-bound pyrite below a horizon of vertically to diagonally oriented microbial sheaths. Pyrite is also distributed between the sheaths.

A) Slightly rounded, rippled depressions of about 10 to 50 cm diameter on microbial mat-stabilised siliciclastic tidal flats. -E. Reineck; modified after photo published in Reineck (1979). (B) Transition from the noneroded biostabilised surface into a ripple patch; ripple crests merge laterally with the non-eroded surface. Eroded worm tubes at the margins. Photo: Nora Noffke. (C) Individual ‘Astropolithon’-like feature on the surface of an intertidal beach: flat bulge rising on top of beach sand, central vertical pipe and dykes radiating from the central pipe.

Multilayered crack tapestries may indicate repeated wetting which supplies the micro-organisms with essential water (Figure 2-1-6B). Mats finally protruding above the filled cracks form bulges which mark the former polygonal crack patterns (Figures 2-1-6D to -1-6F). Features and fabrics related to trapping and binding of sediment (Figure 2-1-7) In life, erect cyanobacterial tufts function as binders and bafflers, providing a trap for sediments, organic debris or calcium carbonate precipitates in the water column (Figure 2-1-7A).

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