Definitions for "Stromatolite"
A calcareous deposit, secreted by calcareous algae in the form of laminated domes and columns. Occurs in many cenotes (qv).
A composite, flat-to-domed structure composed of successive mineral layers. Some are known to be produced by the action of bacteria in salt or fresh water, and some ancient ones are considered to be evidence for early life on the earth.
layered sedimentary rock formations bound by colonial bacteria