biostrome


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biostrome

[′bī·ə‚strōm]
(geology)
A bedded structure or layer (bioclastic stratum) composed of calcite and dolomitized calcarenitic fossil fragments distributed over the sea bottom as fine lentils, independent of or in association with bioherms or other areas of organic growth.
(invertebrate zoology)
A flat-bedded, fossil, reeflike structure.
References in periodicals archive ?
Piedrasluengas Peloids, micropeloids, Biostrome development oncoids, rugosans, above oolitic grainstone, chaetetids, Thartharella, in shallow carbonate Tubiphytes, beresellids, platform.
They built biostromes associated with rugose corals and chaetetids (Piedras Luengas Section, Minwegen, 2001) and built reefal structures associated also with rugose corals and chaetetids (Playa de la Huelga Section, Minwegen 2001; Bahamonde, 2008).
Other Bangor buildups in Alabama are coral biostromes, microbe-coral reefs, and bryozoan-microbial mounds.
Biostromes (life layers) are bioconstructions like mounds, but with a tabular f orm.
Uncommon carbonate buildups are small isolated reefs, mounds, and biostromes (Kopaska-Merkel and Haywick, 2001).
A progressive deepening during the Middle Oxfordian led to the general development of sponge facies, characterized by microbiolite build-ups interbedded with biostromes. Relatively open marine conditions in the platform were restored at early Transversarium Chronozone (Parandieri to Luciaeformis subchronozones).
Composition, structure and environmental setting of Silurian bioherms and biostromes in northern Europe.
Lower Carboniferous serpulid patch reefs, bioherms and biostromes. Nature, 242, 41-42.
Carbonate clast-supported breccia lithofacies containing algal biostromes, bryozoans, stromatoporoids and large coral reef fragments, become more important toward the top of the formation.
Upsection, pure, micritic, thickly bedded limestones with abundant rudists (Toucasia and Requienia) forming biostromes and bioclastic floatstones prevail (Figs.
At Carrasqueira, for example, Beds 'K' and 'L' are dolomitic and while they contain quite amazing biostromes of Radiolites peroni they contain few, if any, stratigraphically useful foraminifera.