By Tucker M.E., Wright V.P.
Read or Download Carbonate sedimentology. Blackwell Science. 482 pp PDF
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Additional resources for Carbonate sedimentology. Blackwell Science. 482 pp
Mineralized surfaces тау Ье present, with Ре and Мп oxides and phosphate. Disconformities and stratigraphic breaks сап also occur in drowned platform sequences. atform , reefs with their higher production rate than surrounding areas тау Ье аЫе to keep ир with the rapid sea-Ieve! rise. e mor phology if starting fют а patch reef. op оп drowned ramps. eve! andward during ап ensuing still-stand. ead to the formation of а distally-steepened гатр. eve! rise is not sufficient to termin ate most benthic carbonate production, then ап in cipiently drowned platform is produced.
Fine carbonate will Ье derived largely from shallow-water areas where fragmentation of skeletal debris takes place; some lime mud will Ье formed in situ. Thin, graded bioclastic grainstones and packstones will Ье соттоп in the below storm wave-base areas of the ramp, deposited from seaward flowing storm-surge currents. Scoured bases, grooves, even flutes, сап Ье expected оп the bases of these storm beds, as well as а sequence of internal struc tures indicating deposition from waning flow (flat bedding to ripple cross-lamination especially) .
However, it does appear as if the reef did not grow at а shallow shelf margin, but at depths from 30 т down to 200 т. f margin а few kilometres back from this slightly deeper-water reef. Onshelf 'Carlsbad facies' аге skeletal grainstones-packstones, stromatolitic lime mudstones and calcisphere and ostracod wackestones, with tepee structures, vadose pisolites and fenestrae (Fig. 2. 16) . omitic 'Capitan facies' . astics ('Chalk Вluff' and 'Веrnаl' facies). ru/ в eгosion suгface ---------==---- - backгeef and _---гeef fla!