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A stratified rock deposit, such as coal or carbonate, formed from the remains of sedentary organisms such as trees or corals, crinoids, and brachiopods.

[bio— + Greek strōma, bed, mattress; see ster- in Indo-European roots.]


(Geological Science) a rock layer consisting of a deposit of organic material, such as fossils
[C20: from bio- + Greek strōma covering]
References in periodicals archive ?
The 12th International Symposium on Fossil Cnidaria and Porifera will address corals and sponges through time and space, during the reef crisis in earth's history, bio-mineralisation, coral growth, biostrome forming and reef building from a micro-to macro scale.
A boundstone of auloporoids and chaetetids has been identified in the level 16 of van de Graaff (1971a), which Mingewen (2001) denominated as a biostrome of chaetetids with syringoporids and rugose corals and which was sampled for this study.
The Mulde Brickclay Member is developed as marls and marly lime-stones terminating in a halysitid-heliolitid biostrome.
6) Finally, at the middle Oxfordian, early Transversarium Chronozone the whole platform was homogeneized again and underwent a slow, uniform subsidence, favouring the recovery of subtidal conditions and development of sponge limestone bioherm and biostrome facies.
Shell disintegration and taphonomic loss in rudist biostromes.
The underlying Paadla Stage is represented by bioclastic limestones, interbedded with bands of marlstones, and coral-stromatoporoid biostromes.
Other Bangor buildups in Alabama are coral biostromes, microbe-coral reefs, and bryozoan-microbial mounds.
Some researchers have stated that these are not true barrier reefs but rather composed of several vertically stacked flat biostromes (Bjerkeus & Eriksson 2001; Floden et al.
Microconchid patch reefs, bioherms, and biostromes are known from the Lower Carboniferous (Tournaisian) of Cumberland and Roxburghshire (Leeder 1973).