HISTORY OF THE TECTONIC DEVELOPMENT OF THE ALPINE FOLDED REGION OF SOUTHEASTERN EUROPE AND ASIA MINOR - NEW DATA ON THE TECTONIC STRUCTURE AND HISTORY OF DEVELOPMENT OF THE ALPINE ZONE OF EUROPE
Titel:
HISTORY OF THE TECTONIC DEVELOPMENT OF THE ALPINE FOLDED REGION OF SOUTHEASTERN EUROPE AND ASIA MINOR - NEW DATA ON THE TECTONIC STRUCTURE AND HISTORY OF DEVELOPMENT OF THE ALPINE ZONE OF EUROPE
Auteur:
Muratov, M. V.
Verschenen in:
International geology review
Paginering:
Jaargang 6 (1964) nr. 1 pagina's 99-118
Jaar:
1964-01
Inhoud:
The Alpine folded region of Southern Europe contains young mountain structures and clearly defined foredeeps that cut it off from platforms on the north and south. Foredeeps are formed in the final stage of development of geosynclinal folded regions simultaneously with elevations of mountain structures. Thus, the Alpine belt of Eurasia is a geosynclinal region in the mature stage of development. Two periods are distinguished in the geologic history; the first, comprising the Paleozoic, is terminated by Hercynian folding; the second, comprising the Mesozoic and Cenozoic, is the Alpine period. Alpine history may be divided into two stages; a geosynclinal stage proper, and a final stage of geosynclinal development and mountain building. The first stage may be divided into three phases: 1) early, 2) maximum development of geosynclinal troughs, and 3) closure of geosynclines. The early phase occurred during Triassic, Lower and Middle Jurassic, and in some places, Upper Jurassic and Lower Cretaceous. Marine and lagoonal sediments were deposited and carbonates were dominant. There also developed deep, fault-limited trenches accompanied by volcanism. At the end of Jurassic and at the beginning of Cretaceous, new geosynclinal troughs were formed in areas of former carbonate deposition. These troughs were filled by thick beds of flysch-type sediments; alternating argillites and sandstones. In some troughs volcanic rocks predominated. This period of maximum trough development, called "flyscheogenic," lasted through Late Cretaceous, Paleocene, lower and middle Eocene. Granitoid intrusions are related especially to the first two phases of the geosynclinal stage. Closure of the "flyscheogenic" geosynclines began after Middle Eocene and continued to the end of the Oligocene or beginning of the Miocene. Geanticlinal uplifts increased, merged, and engulfed the geosynclines. The final stage was the formation of mountain uplifts and intermontane and submontane fault-bounded troughs, imposed on various older structural elements. The depressions and external foredeeps were filled with molasse-type sediments. John D. Haun
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