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.
"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