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Title: fossil stromatolite
Caption: Cross-section of a fossil Stromatolite. Stromatolite (Chlorellopsis colonia Reis) from the Fort Laclede Bed, Laney Member, Bridger A-B of the Green River (Formation). Stromatolites are formed by the trapping, binding, and cementation of sedimentary grains by microorganisms, especially cyanobacteria or blue-green algae.
Category: nature • Geology & Fossils
Credit: Album / Science Source / Ted Kinsman
Image size: 4802 × 4078 px | 56.0 MB
Print size: 40.7 × 34.5 cm | 1890.6 × 1605.5 in (300 dpi)