allochem


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allochem

[′a·lō‚kem]
(geology)
Sediment formed by chemical or biochemical precipitation within a depositional basin; includes intraclasts, oolites, fossils, and pellets.
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Clast type 2 has an allochem suite that is almost completely dominated by strongly aligned disarticulated and abraded thin shelled bivalves (IPosidonia) and small quantities of fine micropeloids that appear light grey in PPL.
Sedimentology of a middle Jurassic base-of-slope environment, Cutri Formation, Mallorca
The microfacies is characterized by skeletal allochems which are the only allochemical constituents marked by moderate diversity of organisms with allochem to micrite ratio of 7:3.
Microfacies analysis and diagenetic fabric of Lockhart Limestone exposed along Nathiagali-Murree Road District Abbottabad Pakistan
These microfacies have been studied on the basis of orthochem and allochem elements, their percentages, and their texture in the stratigraphy section [19].
Microfacies study of Asmari Formation in the Northwest and Southeast of Shiraz, Iran
Additional allochem particles include pelloids, some spherical single-walled calcispheres, and rare microcrinoid ossicles.
Palaeoenvironmental significance of middle Oxfordian deep marine deposits from La Manga Formation, Neuquen Basin, Argentina
The microfacies analysis represents the allochem types matrix textural features and fossils content.
Integrated paleoenvironmental bio- and sequence-stratigraphic analysis of the late Thanetian Lockhart Limestone in the Nammal Gorge section western Salt Range Pakistan
The microfacies analysis details the allochem matrix textural features and fossils content of the lithofacies (WF1-WF9).
Lithofacies paleoenvironments and sequence stratigraphic modelling of the Wargal Limestone: Implication for reservoir characterization in the Salt Range northwest Pakistan
The allochem and matrix ratio is3:7, according to visual estimation, the average relative abundance of various faunal and floralconstituents is Lockhartia (15%), Operculina(1%) and Milliolid up to (7%).
Biostratigraphy and depositional environments of the Early Eocene Margalla Hill Limestone, Kohala-Bala area, Haripur, Hazara Fold-Thrust Belt, Pakistan
allochem type, composition, texture, sedimentary structures and rock types), three microfacies and five sub microfacies are recognized (Fig.
Microfacies and diagenetic-fabric of the Samana Suk Formation at Harnoi Section, Abbottabad, Khyber Pakhtunkhwa, Pakistan
Bioclast is the dominant allochem type which includes; sponge spicules (3 Percent), ostracods (3 Percent), intraclasts (1 Percent) and pellet (3 Percent).
Microfacies analysis and sequence stratigraphic modeling of the Samana Suk Formation, Chichali Nala, Trans Indus Ranges, Punjab, Pakistan
This stage is composed of limestone with abundant larger foraminifera, algae is the second dominant allochem type.
Depositional environment of the Patala Formation in biostratigraphic and sequence stratigraphic context from Kali Dilli Section, Kala Chitta Range, Pakistan
On the basis of detailed field and petrographic characteristics, four microfacies with distinct textures, allochem types, fossil contents and sedimentary structures are identified and interpreted.
Sedimentology of the Lockhart limestone (Paleocene), Changlagali area, Nathiagali-Murree Road, Hazara, N. Pakistan
In classifying limestone, various attempts have been made, notable among them are the classification scheme of Folk (1959,1962) which was based on three components: allochems, matrix and cements.
Petrographical study of Ewekoro carbonate rocks, in Ibese, South Western Nigeria

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