Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1753228 | International Journal of Coal Geology | 2013 | 14 Pages |
Abstract
The present-day actions of waves and tides contribute to the erosion of the frontal parts of the humate-impregnated sandstone horizon, resulting in the formation of the dark rounded sandstone slabs and pebbles that are deposited on nearby beaches. This process provides a fine example of recent black pebble formation that derived from pre-existing organic matter-impregnated source rocks. In contrast to their tropical carbonate counterparts, however, the humate-induced blackening of the sandstone pebbles appears to be relatively unstable, as the impregnated fragments bleach when exposed to air and seawater for a few seasons.
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Authors
Václav Suchý, Ivana Sýkorová, Martina Havelcová, VladimÃr MachoviÄ, AntonÃn Zeman, Hana Trejtnarová,