bioclastic

bioclastic

(ˌbaɪəʊˈklæstɪk)
adj
(Geological Science) (of deposits, esp limestones) derived from shell fragments or similar organic remains
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References in periodicals archive ?
The mechanical compaction is interpreted based on the presence of bioclastic debris (Fig.
The Baltoscandian sea also had a very flat seabed and a low depth gradient, which is reflected in a very smooth lateral sedimentation trend from inner ramp pure bioclastic carbonates towards outer ramp argillaceous limestones and marls (Fig.
The facies that make up the continental shelf are the platform (silt and clay) and continental muds, sands (quartzose and bioclastic), terrigenous gravel and shells.
This facies is bioclastic grainstone and consists of brachiopod shells, bryozoans, ostracods, gastropods, crinoids and mollusks (Fig.
The Lower to Middle Devonian sequence is dominated by two groups of carbonate facies: the first are bioclastic and biolithic sediments deposited in comparatively shallow, high energy settings while the second are micritic and biomicritic sediments deposited in comparatively deep, low energy settings.
This theme appears to play a vitally significant role associated with several natural disasters, such as landslides, earthquakes, debris flows, and surface collapses, and engineering applications; for instance, how to drive long offshore piles into bioclastic, calcareous soils or how to choose an applicable PSD of materials in constructing large earth and rockfill dams [1-9].
The lower part is gray limestone Gray limestone intercalated with dolomitic limestone Gray limestone, dark-brown shale Dark-gray limestone Permian Dark-gray limestone Gray and dark-gray limestone Limestone intercalated with bioclastic limestone Silurian Gray and dark-gray mudstone Table 2: Model parameters.
This salt-tolerant grassland develops in crevices and rocky edges of limestone cliffs of Bonifacio (lower and middle Miocene: bioclastic limestone (Rossi & Rouire, 1980a, b) with a sandy-silty interstitial matrix.
The well exposed Upper Sinemurian, Pliensbachian and Lower Toarcian deposits cropping out in the coastal cliffs of the eastern part of the Asturias region in northern Spain, are represented by a succession of alternating lime mudstone to bioclastic wackestone and marl (Fig.
(a) M401 well, [O.sub.3][l.sup.1], 2242.0 m, sparry bioclastic limestone, transmission of single polarization, 10 x 2.5; (b) K1 well, [O.sub.3][l.sup.3], 3283.56 m, mud micrite, transmission orthogonal polarization, 10 x 10; (c) LN1 well, [O.sub.3][l.sup.5], 4728 m, microcrystalline sand-dust bioclastic limestone, transmission of single polarization, 10 x 10; (d) M2 well, [O.sub.1-2][y.sup.2], 2377.5 m, powder fine-grained dolostone, transmission orthogonal polarization, 10 x 10; (e) M4 well, [O.sub.1-2][y.sup.1], 2021.6 m, microcrystalline limestone, transmission orthogonal polarization, 10 x 10; (f) K2 well, 3821.95 m, [O.sub.1-2][y.sup.3], fine-grain dolostone transmission orthogonal polarization, 10 x 2.5.
At Locality 1 (Fig.1; GR24[degrees]29'35"N, 54[degrees]38'04"E), the cross-bedded aeolianite is separated locally from an underlying, flat topped, coarsely bioclastic marine limestone by a 40 cm thick, reddish gypsum layer (Evans and Kirkham, 2005; Kirkham, 2011; Fig.