Page 81 - Carbonate Facies in Geologic History

68 Outline of Carbonate Petrography

I()~ ISMF-11 & 12 ROUNDED, COATED, BIOCLASTIC CALCARENITE
00 GRAINSTONE TO PACKSTONE
I~~~ jSMF-12 ENCRINITE GRAINSTONE

~ SMF-12 ROUNDED BIOCLASTIC CALCARENITE WITH DASYCLADACEANS
I££.J
~ SMF-22 ONKOIDAL-LARGE FORAM WACKESTONE

~sMF-14 CARBONATE CONGLOMERATIC LAG DEPOSIT
~
~ SMF-15 OOLITE-PISOLITE
~
r;-;l SMF-16 PELOIDS, PELSPARITE
~
I.~ _I SMF-17-18 PELOIDAL GRAPESTONE
•• lh

~ SMF-19 RESTRICTED MARINE PELOIDAL WACKESTONE, PELLETED
ttta:EJ MUDSTONE
MfII~1 SMF-20-21 ALGAL STROMATOLITIC AND SPONGIOSTROME MICRITE
~ 0'
~ SMF-24 FLAT PEBBLE CONGLOMERATE, LITHOCLASTIC GRAINSTONE
~

~ SMF-23 PURE MICRITE AND MICRITE MATRIX

~ BASINAL SHALE OR SILT, COMMONLY SILICEOUS

~ OR MARL OF SHELF
SHALE

l~r~r:1 SANDY SILTY LIMESTONE

Fig. II1-1 (continued)
SMF -18 Foraminifera or dasycladacean grainstones (Plates VI, XIII B, XXX B-D)
This sediment occurs as concentration of tests with peloids commonly in tidal bars
and channels of lagoons.

Restricted Marine Shelf Lagoons, Protected Environment (Facies Belts 7 and 8)

SMF -19 Laminated to bioturbated pelleted lime mudstone-wackestone grading occasionally
into pelsparite with fenestral fabric, Loferite (Plate XII B)
An ostracod-peloid assemblage is common within these mudstones. Micrite with
scattered foraminifera, gastropods and algae also occur. This biota represents depo-
sition in very restricted bays and ponds.
SMF-20 Algal stromatolite mudstone (Flligel, 1972) (Plate XIV)
Dense and closely-spaced growth laminations swelling over protuberances charac-
terize this sediment. Fine lime mud is preferentially trapped on the highest areas