Search results
Results from the WOW.Com Content Network
Fossilized stromatolites exhibit a variety of forms and structures, or morphologies, including conical, stratiform, domal, columnar, [13] and branching types. [14] Stromatolites occur widely in the fossil record of the Precambrian but are rare today. [15]
A bioherm is a landform of organic sedimentary rock enclosed or surrounded by rock of different origin. [2] A biostrome is a distinctly bedded or broadly lenticular sedimentary rock landform. [ 3 ] Krumbein additionally used these terms to distinguish different shapes of stromatolites : "Distinctly bedded, widely extensive, blanketlike build ...
Huge thrombolite-stromatolite mass from the Cambrian of Virginia. This remarkable specimen is a >2 ton, 1.9 meter long-axis diameter thrombolite bioherm on public display at the Virginia Museum of Natural History (Martinsville, Virginia, USA). It has a thrombolite core with a pustulose stromatolitic outer layer. It was collected in June 2008.
The stromatolites found today are almost all carbonate rocks (made of limestone), but these structures are mostly composed of the minerals gypsum and halite (rock salt), Hynek said.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
(The Center Square) – Illinois employers are bracing for minimum-wage hikes, which may lead to more job cuts around the state. Illinois’ minimum wage is rising from $14 per hour to $15 on Jan ...
Charlotte Hornets guard LaMelo Ball is the NBA's second-leading scorer, averaging 31.1 points per game. (Photo by Jared C. Tilton/Getty Images) (Jared C. Tilton via Getty Images)
Stromatolites, bioherms (domes or columns similar internally to stromatolites) and biostromes (distinct sheets of sediment) are among such microbe-influenced build-ups. [3] Other types of microbial mat have created wrinkled "elephant skin" textures in marine sediments, although it was many years before these textures were recognized as trace ...