metabentonite

metabentonite

[¦med·ə′bent·ən‚īt]
(geology)
Altered bentonite, formed by compaction or metamorphism; it swells very little and lacks the usual high colloidal properties of bentonite.
References in periodicals archive ?
On the distribution of the main metabentonite stratum (d, XXII) in the Middle Ordovician of Baltoscandia.
New correlations of Telychian (Silurian) bentonites in Estonia/Telychi (Silur) bentoniitide uued korrelatsioonid Eestis
Occurrence: In a metabentonite within a sequence of dark gray mudstones.
Abstracts of new mineral descriptions
However, C rugata occurs in certain intervals of the Halliku Formation both below and above the metabentonite bII (Figs.
The Pirgu regional stage (Upper Ordovician) in the East Baltic: lithostratigraphy, biozonation, and correlation/Pirgu regionaalne lade (Ulem-Ordoviitsium) Baltikumis: litostratigraafia, biotsonaalsus ja korrelatsioon
Metabentonite geochemistry: magmatic cycles and graptolite extinctions at Dob's Linn, southern Scotland.
Traces of explosive volcanic eruptions in the Upper Ordovician of the Siberian Platform
In the Ohesaare drill core a metabentonite layer at a depth of 345.8 m has been treated as the boundary marker of the stratotype level between the Adavere and Jaani stages (Nestor 1997).
Chitinozoans of the Margachitina margaritana Biozone and the Llandovery-Wenlock boundary in West Estonian drill cores/Margachitina margaritana biotsooni kitiinikud ja Llandovery-Wenlocki piir Laane-Eesti labiloigetes
Metabentonite layers in the Estonian geological sections of Pirgu age refer to volcanism and tectonic activity in the west (Kiipli et al.
Mean grain size fluctuations of the siliciclastic component in the Aizpute-41 core: implication for end-Ordovician glaciation
Using these correlations, Vingisaar (1972) published the first distribution and thickness map of the 'main metabentonite' layer across the entire Baltoscandian area.
Geochemical discrimination of the Upper Ordovician Kinnekulle Bentonite in the Billegrav-2 drill core section, Bornholm, Denmark
Metabentonite composition related to sedimentary facies in the Lower Silurian of Estonia.
Correlation of Telychian sections from shallow to deep sea facies in Estonia and Latvia based on the sanidine composition of bentonites/Eesti ja Lati madal- ja suvamere faatsieste Telychi labiloigete korrelatsioon bentoniitide sanidiini koostise alusel
The last paper noted also all known metabentonite beds (in the Isakivtsy--3, Prygorodok--6, Varnytsya--2, Trubchyn--2, Dzvenygorod--1).
Pridoli carbon isotope trend and upper Silurian to lowermost Devonian chemostratigraphy based on sections in Podolia (Ukraine) and the East Baltic area/Susinikisotoopide suhte arengutrend Pridolis ja Ulem-Siluri ning Devoni alguse kemostratigraafia Podoolia (Ukraina) ja Baltikumi andmetel
The Bjerntvet metabentonite: a new correlation tool for the Silurian of the southwest Oslo Region.
Geochemistry and correlation of volcanic ash beds from the Rootsikula Stage (Wenlock-Ludlow) in the eastern Baltic / Rootsikula lademe vulkaaniliste kihtide geokeemia ja korrelatsioon Ida-Baltikumis
The Kinnekulle K-bentonite (or metabentonite) is the thickest and most widely distributed altered volcanic ash bed in the Ordovician of Baltoscandia (Bergstrom et al.
Discovery of the Ordovician Kinnekulle K-bentonite at the Poosaspea cliff, NW Estonia/Kinnekulle K-bentoniidi paljand Poosaspea pangal (Loode-Eesti)
Tsegelnyuk initiated a multidisciplinary revision of the sequence, including stratigraphy (especially lithostratigraphy), different groups of fossils, metabentonite beds for correlation purposes, etc.
Three global carbon isotope shifts in the Silurian of Podolia (Ukraine): stratigraphical implications/ Kolm globaalset susinikisotoopide suhte anomaaliat Podoolia (Ukraina) Siluris: stratigraafilised jareldused
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