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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Geological Science) a rock layer consisting of a deposit of organic material, such as fossils
[C20: from bio- + Greek strōma covering]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Stromatolitic biostrome of the Cambrian Fengshan Formation at the Xiaweidian section in the western suburb of Beijing, North China.
"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.
Biostrome. A planar feature built (at least in part) by organisms.
The Mulde Brickclay Member is developed as marls and marly lime-stones terminating in a halysitid-heliolitid biostrome. Based on regional topography and the rich benthic and pelagic faunal association comprising brachiopods, trilobites, tentaculitoids, scolecodont-bearing polychaetes, graptolites, chitinozoans and abundant sclerobionts, it is interpreted as having been deposited in a low-energy proximal shelf environment below the photic zone (Calner et al., 2000; Jarochowska et al.
(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. Lethaia 32:101-112.
The underlying Paadla Stage is represented by bioclastic limestones, interbedded with bands of marlstones, and coral-stromatoporoid biostromes. The base of the Kuressaare Stage coincides with an increase in the clay component (Perens et al.
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.
The buildups may locally occur as metre-decimetre scale laterally continuous patches (i.e., biostromes), dominated by branching corals in growth position and large stromatoporoids (i.e., decimetre-size).
Microconchid patch reefs, bioherms, and biostromes are known from the Lower Carboniferous (Tournaisian) of Cumberland and Roxburghshire (Leeder 1973).