Digitale Medien
Oxford, UK
:
Blackwell Publishing Ltd
Sedimentology
36 (1989), S. 0
ISSN:
1365-3091
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Geologie und Paläontologie
Notizen:
The grain fabric of a laboratory antidune composed of coarse- to medium-grained sand shows a high-angle upcurrent imbrication both on the upstream and downstream sides. Such a grain fabric differs from a normal dune or a megaripple, where grain alignment displays an upcurrent imbrication relative to the depositional slope in the foreset lamina and/or near parallelism with the slope surface in the toe-set lamina. Recognition of antidunes in ancient rocks is difficult, but detailed examination of grain fabric of cross-stratification makes it possible to distinguish antidunes or ‘backset’ bedding from normal dunes or megaripples.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1365-3091.1989.tb01537.x
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