1. Plural of biostrome; layered or mound-like accumulations of skeletal remains of organisms (such as corals, mollusks, or bryozoans) that form in shallow marine environments without significant internal structure.
Usage: geology; paleontology; technical term

Examples

• The Paleozoic biostromes in this region contain abundant fossil shells and coral fragments.
• Geologists studied the biostromes to understand ancient shallow-sea environments.
• These biostromes differ from true reefs in that they lack the rigid framework structure.
• The limestone layers were formed from multiple biostromes deposited over millions of years.
• Biostromes provide valuable information about past marine ecosystems and biodiversity.