Geology Reference
In-Depth Information
Inner ramp
Mid
Outer
Basin
ramp
ramp
Peritidal Lagoon Shoal
Restrict. Open
marine
RMF 1:
Peloidal calcisiltite with spicules
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RMF 2:
Argillaceous burrowed mudstone/wackestone
RMF 3:
Burrowed bioclastic wacke/packstone with
diverse fossils
RMF 4:
Peloidal wackestone/packstone
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RMF 5:
Pelagic mudstone
RMF 6:
Graded, laminated bioclastic grainstone
RMF 7:
Bioclastic packstone, abundant echinoderms
RMF 8:
Burrowed multigrain packstone/wackestone
RMF 9:
Wackestone/packstone/floatstone with ramp
derived intra and bioclasts
RMF 10:
Limestone conglomerates
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RMF 11:
Marls with intraclasts and limestone pebbles
RMF 12:
Boundstone
RMF 13:
Wackestone/packstone with larger foraminifera
RMF 14:
Packstone/grainstone with various bioclasts
RMF 15:
Bioclastic floatstone, reefderived material
RMF 16:
Mudstone/wackestone with miliolids
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RMF 17:
Bioclastic wackestone with dasyclads
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RMF 18:
Bioclastic wackestone with ostracods
RMF 19:
Nonburrowed lime mudstone
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RMF 20:
Bioclastic wackestone/packstone with algae
and benthic foraminifera
RMF 21:
Oncoid packstone/floatstone
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RMF 22:
Finely laminated dolomitic or lime mudstone
RMF 23:
Fenestral bindstone
RMF 24:
Intraclast mudstone/wackestone
RMF 25:
Laminated evaporitecarbonate bindstone
RMF 26:
Bioclastic grainstone/packstone with diverse
skeletal grains
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RMF 27:
Bioclastic grainstone/packstone with a few
dominant skeletal grains
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RMF 28:
Bioclastic grain/floatstone, disorganized fabric
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RMF 29:
Ooid grainstone with concentric ooids
RMF 30:
Shelly ooid grainstone and packstone
Fig. 14.30.
Strongly generalized
distribution of microfacies types in different parts of a homoclinal carbonate ramp.
This is
not a 'model' and the Ramp Microfacies Types do not have the character of Standard Microfacies Types. The figure just
shows some microfacies types frequently described in studies dealing with Paleozoic and Mesozoic carbonate ramps. RMF 9,
RMF 10 and RMF 11 occur predominantly in distally steepened ramps. See text for the correlation of some of these RMF
Types with SMF Types of platform carbonates.
