Petrofabric examination of the main suevite of the Otting Quarry Noerdlinger Ries, Germany

Details Petrofabric examination of the main suevite of the Otting Quarry Noerdlinger Ries, Germany Petrofabric examination of the main suevite of the Otting Quarry Noerdlinger Ries, Germany

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29..417b&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 29, no. 3, p. 417-422

Computer Science

6

Breccia, Chemical Composition, Metamorphism (Geology), Meteorites, Mineralogy, Mines (Excavations), Particle Size Distribution, Petrography, Shock Waves, Correlation, Crystallization, Germany, Glass, Grain Size, Sediments, Statistical Analysis, Textures

Scientific paper

Extensive textural studies have been carried out at the suevite in a quarry several kilometers east of the rim of the Noerdlinger Ries crater. The composition, grain size and clast orientation of suevite on a 6 m high vertical section were quantified macroscopically, as well as microscopically. There exists a strong correlation between the texture of a clastic rock and the transport mechanism of its components. This correlation can be used to obtain information about the transport mechanism of the suevite components, which is fundamental to the understanding of the impact process. A consolidated main suevite enriched in 'Flaedle' and 'Bomben' can be distinguished from a poorly consolidated base suevite, deprived of 'Faedle' but relatively well sorted in clast grains. It has been proven that the glass clasts in the main suevite exhibit an inverse gradation, while the crystalline clasts in the lower half of the section show a normal gradation. Eighty one percent of the samples investigated possess oriented clasts equal to or greater than 2 mm. From the results of this investigation, a predominantly horizontal transport of the main suevite is indicated for the area of investigation. This transport could occur in the form of a suevitic flow similar to that of a pyroclastic flow.

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