On the distribution of the main metabentonite
stratum (d, XXII) in the Middle Ordovician of Baltoscandia.
Occurrence: In a metabentonite
within a sequence of dark gray mudstones.
However, C rugata occurs in certain intervals of the Halliku Formation both below and above the metabentonite
geochemistry: magmatic cycles and graptolite extinctions at Dob's Linn, southern Scotland.
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).
layers in the Estonian geological sections of Pirgu age refer to volcanism and tectonic activity in the west (Kiipli et al.
Using these correlations, Vingisaar (1972) published the first distribution and thickness map of the 'main metabentonite
' layer across the entire Baltoscandian area.
composition related to sedimentary facies in the Lower Silurian of Estonia.
The last paper noted also all known metabentonite
beds (in the Isakivtsy--3, Prygorodok--6, Varnytsya--2, Trubchyn--2, Dzvenygorod--1).
The Bjerntvet metabentonite
: a new correlation tool for the Silurian of the southwest Oslo Region.
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.
Tsegelnyuk initiated a multidisciplinary revision of the sequence, including stratigraphy (especially lithostratigraphy), different groups of fossils, metabentonite
beds for correlation purposes, etc.