a laminated, sedimentary rock structure formed primarily in Precambrian shallow pools by mats of sticky, blue-green algae which trapped layers of silt, esp. of calcium carbonate: these wavy or round formations serve as evidence for dating the first life forms on earth
Origin of stromatolitefrom German stromatolith from Modern Latin stromat-, stroma: see -lite
A usually rounded or columnar sedimentary structure consisting of alternating layers of carbonate or silicate sediment and fossilized microbial mats, produced over geologic time by the trapping, binding, or precipitating of minerals by groups of microorganisms, primarily cyanobacteria.
Origin of stromatoliteLate Latin strōma strōmat- covering ; see stroma . -lite