Shallow Marine Carbonate Environments. "Carbonate sediments are born not made". Subtidal Carbonate Factory. Shallow (< 20m), subtidal, well circulated, marine shelf environment. Carbonate (mostly biogenic) sediment is transported both shoreward and basinward. Controls on Carbonate Facies.
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"Carbonate sediments are born not made"
Rimmed Carbonate Platform
abundant biogenic carbonate mud production: good circulation, little temperature variation, abundant bioturbation
patch reefs and grainstone shoals
carbonate wackestone/ mudstone facies; peletal muds and "grapestone"
brachiopods,pelecypods, gastropods, crinoids, echinodermsGeneric Rimmed Carbonate Platform Model: "Y“ facies
extremes of temperature and salinity; hypo- to hypersaline (climate determined): highly variable physical environment
stromatolites and cryptalgal laminations common: algal mudstone
algal mats, dessication features, rip-up clasts and early lithification, oncolites, fenestrae, primary dolomite and evaporite depositsGeneric Rimmed Carbonate Platform Model: "Z" facies