This belt contains 9 facies: bioclastic wackestone
with pelagic bivalve and foraminifera (O1), coral boundstone (O2), marl with foraminifera (O3), bioclastic mudstone mudstone (O4), bioclastic floatstone (O5), bioclastic packstone (O6), sandy bioclastic packstone (O7), bioclastic packstone to grainstone (O8) and bioclastic grainstone (O9) (Figs.
Petrographically, the dominating thick finely laminated uniform siliceous-carbonate mudstone (MS) oil shale intercalates with variable intervals of grain-bearing oil shale, in which interbeds of proper mudstone alternate with laminae, lenses and thin interbeds of wackestone
Wavy- to horizontal-bedded, lithobioclastic, dolomitic floatstone to skeletal wackestone
These microfacies includes bioclastic grainstone microfacies, bioclastic ooidal peloidal packstone-grainstone microfacies, Siliciclastic bioclastic wackestone
microfacies and peloidal mudstone microfacies.
Thin sections of beds C22/24 and C26 situated immediately above the track surface show, in relative abundance order, fragments of bivalves (ostreids and rudists), benthic foraminifera (Miliolidae, Lituolidae, Textularidae, Ataxofragmiidae), radiolarians (Spumellaria), ostracods, corals (Scleractinia), gastropods, and echinoids in a mainly wackestone
texture with biomicritic matrix (Fig.
The matrix of the reef-core limestone is composed of wackestone
to mudstone, with a high probability of a similar mix of authochthonous and allochthonous micrite (Kroger et al.
The depositional environment depicted is high energy sand shoals, bar, or beach for Grainstone microfacies, inner shelf with moderate water circulation for Packstone microfacies, lagoonal settings with open and restricted circulation for Wackestone
microfacies and low energy environment like lagoon and on outer shelf for Mudstone microfacies.
c) This microfacies is a wackestone
(occasionally mudstone) with foraminifera, charophytes, ostracods and gastropods (Fig.
Carbonate ellipsoidal nodules up to 10 cm in length are scattered amongst the shale and wackestone
facies, preferentially located along bedding planes.
microfacies, (planktonic bioclastic wackestone
and dolomitic bioclastic wackestone
as submicrofacies), (3).
, packstone or grainstone) are common too, and they formed in a large variety of environments (flanks of buildups, shallow tidal flats or storm beds in inner or medial carbonate platforms).
2006) noted that Berry & Murphy (1975) found several Ludlow graptolites (Neodiversograptus nilssoni, Saetograptus colonus, Bohemograptus bohemicus) in the Simpson Park I section, Nevada, in the lower part of the lime mudstone wackestone
bed of the Roberts Mountain Formation.