stromatolite

(noun)

a laminated, columnar, rock-like structure built over geologic time by microorganisms such as cyanobacteria

Related Terms

  • sacculus
  • indel
  • gram-positive

Examples of stromatolite in the following topics:

  • The Origins of Archaea and Bacteria

    • Stromatolites form layered rocks made of carbonate or silicate.
    • Although most stromatolites are artifacts from the past, there are places on earth where stromatolites are still forming.
    • For example, growing stromatolites have been found in the Anza-Borrego Desert State Park in San Diego County, California.
    • (a) These living stromatolites are located in Shark Bay, Australia.
    • (b) These fossilized stromatolites, found in Glacier National Park, Montana, are nearly 1.5 billion years old.
  • Introduction to the Study of Biology

    • Stromatolites, sedimentary accretions formed by the actions of cyanobacteria, provide fossil evidence of life on Earth about 3.5 billion years ago.
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