Syneclise


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Syneclise

 

a very gently sloping depression in the earth’s crust within a platform. The structure has irregular roundish or oval contours; diameters range to several hundred km and sometimes exceed 1,000 km. Depths are usually 3 to 5 km. Syneclises are formed over a long period of time (hundreds of millions of years), with comparatively minor changes in contour. Sediments are thicker and geologic columns are more complete at the center of a syneclise than at the periphery, where the columns are characterized by numerous hiatuses in sedimentation. Syneclises often develop over aulakogenes and often consist of separate depressions complicated by arches.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The deposits of the Khovanshchinian RS are spread on the East European Platform within the Moscow Syneclise and on the eastern slope of the Voronezh Anteclise.
Oil and hydrocarbon source rocks of the Baltic Syneclise. Oil Gas J., 1994, 92, 69-73.
The neotectonic Central European Subsidence Zone is placed in the NE part of the West-European Platform, which embraces an area comprised between the Central European Uplift and the East-European Platform including the Fennoscandian Shield and Baltic-Belarus Syneclise. The axis of this zone follows the Late Palaeozoic Central European Basin System (CEBS) (Dadlez et al., 1998; Scheck et al., 2002; Otto, 2003; Scheck-Wenderoth and Lamarche, 2005); an area repeatedly deformed since the Late Carboniferous.
Stratigraphy and lithofacies of the Ordovician in the western part of the Peri-Baltic Syneclise. Biul.
These are the Voronezh Syneclise in the Russian Platform and the Ebelyakh, Tyung, Nepa-Chona, Chuna-Biryusa and other areas in the Siberian Platform.
The Metsahovi (MEF) and Laitila (RAF) stations are located on the Baltic Shield, the Matsalu (MTSE) and Vasula (VSU) stations on the southern slope of the Baltic Shield, the Slitere (SLIT), Paberze (PABE) and Paburge (PBUR) stations on the East European Platform, within the Baltic Syneclise and the Suwalki (SUW) station lies at the border between the Baltic Syneclise and the Mazuro-Belorussian Anteclise.
The Paleozoic sea transgression connected the Baltic syneclise with the Moscow basin and the ancient oceans.
In contrast to the magmatic rocks in NE Poland, the Baltic dolerites are situated in the deepest axial part of the Baltic syneclise that does not show any evidence for having undergone relative uplift during the Permo-Carboniferous.
Tectonic Evolution of the Baltic Syneclise and Local Structures in the South Baltic Region with Respect to their Petroleum Potential.--Vilnius, 1999.
However, the topmost Llandovery Cyrtograptus insectus graptolite Biozone has not been established anywhere in the East Baltic area, not even in the most complete graptolitic sections of the Baltic Syneclise (Paskevicius 1998).