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Badenian echinoids from the Mt. Medvednica and their ecological niches (CROSBI ID 486149)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Mikša, Goran ; Sremac, Jasenka ; Zečević, Marko ; Pezelj, Đurđica Badenian echinoids from the Mt. Medvednica and their ecological niches // 1. slovenski geološki kongres, Knjiga povzetkov. / Horvat, A. ; Košir, A. ; Vreča, P. et al. (ur.). Ljubljana: Geološki zavod Slovenije, 2002. str. 58-x

Podaci o odgovornosti

Mikša, Goran ; Sremac, Jasenka ; Zečević, Marko ; Pezelj, Đurđica

engleski

Badenian echinoids from the Mt. Medvednica and their ecological niches

Irregular echinoids from the Badenian sediments at localities Bizek and Borovnjak in SW Mt. Medvednica were studied. Genera Clypeaster, Echinolampas, Scutella, Schizaster, Heteroclypeus and Spatangus were determined. Medium-sized to large tropical sand dollars predominate in sandstone and Lithothamnium limestone at Bizek quarry. Their appearance in different sediments, and within different microfossil communities, indicate their tolerance to different environmental conditions. Number of specimens decreases in argillaceous sediments and marls. Associated microfauna consists of benthic foraminifers, with predominance of epifaunal taxa - herbivore, or filter-feeders. Only two species of sand dollars (Clypeaster cf. sequenzai and Scutella cf. vindobonensis) were found in nearshore sandstone at Borovnjak. Medium-sized cassiduloids (Echinolampas lecointrae and E. cf. wrighty) were determined from both localities, in association with predominantly miliolid foraminifers. Echinolampas cf. wrighty is always accompanied with Scutella cf. vindobonensis in highly energetic environments at Borovnjak. Heteroclypeus was found in Lithothamnium limestone at Bizek quarry. Spatangus was collected from grey marls at the same locality, accompanied with benthic foraminifers (Cibicides, Cibicidoides), sponge spiculas and well preserved molluscs, indicating deeper, low-energy water. Schizaster parkinsoni, associated with numerous infaunal foraminifers was found in sandstone and argillaceous sandstone at Borovnjak locality. Turbulent nearshore environment, with oscillations in salinity (appearance of brachish ostracods)was presumed.

Badenian; echinoids; ecological niches; Mt. Medvednica

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Podaci o prilogu

58-x.

2002.

objavljeno

Podaci o matičnoj publikaciji

1. slovenski geološki kongres, Knjiga povzetkov.

Horvat, A. ; Košir, A. ; Vreča, P. ; Brenčić.M.

Ljubljana: Geološki zavod Slovenije

Podaci o skupu

1. Slovenski Geološki kongres

poster

09.10.2002-11.10.2002

Črna na Koroškem, Slovenija

Povezanost rada

Geologija