Toarcian radiolaria from Mt. Mangart (Slovenian-Italian border) and their paleoecological implications

Details

Serval ID
serval:BIB_9387961040F2
Type
Article: article from journal or magazin.
Collection
Publications
Title
Toarcian radiolaria from Mt. Mangart (Slovenian-Italian border) and their paleoecological implications
Journal
Marine Micropaleontology
Author(s)
Gorican S., Smuc A., Baumgartner P.O.
ISSN-L
0377-8398
Publication state
Published
Issued date
2003
Peer-reviewed
Oui
Volume
49
Pages
275-301
Language
english
Abstract
Diverse and well-preserved Toarcian radiolarians have been recovered
from a succession of organic-rich shale with intercalations of siliceous
limestone. The succession is located at the Slovenian-Italian border in
the Julian Alps and was deposited on a subsided block pertaining to the
south Tethyan passive continental margin. Twenty spumellarian and 17
nassellarian genera were found in total. Thirty-six taxa were identified
to species level and one new species, Bistarkum mangartense n. sp., is
described. The assemblages show a high predominance of spumellarians
over nassellarians. Spongy spumellarians, especially Orbiculiforma ?,
are markedly abundant. Pantanelliidae are generally rare but reach a
pronounced peak of 13% in one stratigraphic level. Among nassellarians,
Parahsuum is the most abundant but members belonging to Syringocapsidae
are scarce to absent. In addition to paleolatitude and water column
depth, ecological conditions accompanying the early Toarcian global
anoxic event may have to a considerable extent determined the specific
taxonomic composition of these radiolarian faunas. (C) 2003 Elsevier
B.V. All rights reserved.
Create date
06/10/2012 17:23
Last modification date
03/03/2018 19:35
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