Stromatolite

[Britney]

A calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.

[Agnes]

1)A widely distributed sedimentary structure consisting of laminated carbonate or silicate rocks, produced over geologic time by the trapping, binding, or precipitating of sediment by groups of microorganisms, primarily cyanobacteria.
2)TaQs first official album, with such songs as the full version of Innocent Walls. Excellent CD worth buying if you come across it and are a fan of Hardcore Techno.