REAL

Preliminary notes on Early and Middle Jurassic corals of the Bakony Mountains (Hungary)

Dulai, Alfréd (1995) Preliminary notes on Early and Middle Jurassic corals of the Bakony Mountains (Hungary). Hantkeniana, 1. pp. 49-58. ISSN 1219-3933

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Abstract

Hettangian, Pliensbachian and Bajocian corals were examined from 6 localities of the Bakony Mountains. All of the suborders existed in Early and Middle Jurassic are present in the 80 specimens. The determined 6 genera belong to 4 suborders. 88% of the fauna is derived from the Domerian formations, but the number of taxa are nearly equal in Carixian, Domerian and Bajocian. Four genera appeared earlier in the Bakony Mountains, than in other areas. Seventy-seven specimens belong to solitary corals, and only 3 specimens are colonial. Two-third of the fauna is hermatypic at the Pliensbachian localities, but at the same time 80% of the specimens are ahermatypic in Bajocian. Fissures of seamounts and the edge of a seamount are represented at these localities. This means, that the top of the seamounts were nőt sinking below the depth of 100 m during the Pliensbachian, but it may have been below 100 m in Bajocian. The elongated morphotypes of corals stabilized themselves by root-like fixation, or the specimens had to be sunk in the loose sediments. Because the loose sediments were rare at the top of seamounts, the corals are sometimes overtumed (scolecoid specimens).

Item Type: Article
Subjects: Q Science / természettudomány > QH Natural history / természetrajz > QH526 Paleontology / őslénytan
Depositing User: Zsolt Baráth
Date Deposited: 13 Jan 2023 08:29
Last Modified: 13 Jan 2023 08:29
URI: http://real.mtak.hu/id/eprint/156419

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