Page 80 - Carbonate Facies in Geologic History

Shoal and Restricted Marine (Facies Belts 6 to 8) 67

SMF-l BASINAL SPICULITE, BLACK LIME MUDSTONE

SMF-2 MICROBIOCLASTIC AND PELOID

~ SMF-3 PELAGIC FORAMS, NANNOPLANKTON
~
SMF-4 TALUS, LITHOCLASTIC CONGLOMERATE

SMF-4 LITHOCLASTIC, BIOCLASTIC MICROBRECCIA

SMF-5 FORESLOPE CALCARENITE, BIOCLASTIC GRAINSTONE,
PACKSTONE-FLOATSTONE
SMF-6 REEF RUDSTONE

SMF-7 BINDSTONE, LAMELLAR, ENCRUSTING

SMF-7 PLATY ALGAL BAFFELSTONE

SMF-7 TUBIPHYTES BINDSTONE

SMF-7 DENDROID CORAL, STROMATOPOROID BOUNDSTONE

SMF-7 MASSIVE CORAL, STROMATOPOROID BOUNDSTONE

SMF-8 WHOLE FOSSIL WACKESTONE

SMF-9 FORESLOPE, NERITIC OPEN MARINE BIOCLASTIC WACKESTONE

[§JQJ SMF-10 ROUNDED BIOCLASTS IN MICRITE, TEXTURAL INVERSION
@@]
Fig. III-I (continued)

Restricted Marine Shoals (Facies Belt 7 and 8)

SMF -16 Pelsparite (Flugel, 1972) or peloidal grainstone (Plates IX A, XIB, XIII A)
This consists of what are probably hardened fecal pellets, in places admixed with
concentrated ostracod tests or foraminifera. The peloids are derived from organic
pelleting of mud and may represent only very slight water movement. Such sedi-
ment may grade into peloidal wackestone (Type 19) and is common on tidal flats
and natural levees where it contains cm thick graded laminae and fenestral fabric.
This is typical Loferite sediment of Fischer (1964).
SMF -17 Grapestone pelsparite or grainstone (Plates XIlI A, XXX C)
This is a mixed facies of isolated peloids, agglutinated peloids, some coated particles
and lumps which are in part small intraclasts. These are the bahamite type particles
of Beales (1958). The facies is formed in very warm, shallow water with only moder-
ate circulation.