Radensko polje, unit 2 - Orbitopsella sparitic Limestones (Jurassic of Slovenia)

Where: Slovenia (45.9° N, 14.7° E: paleocoordinates 30.8° N, 21.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Early/Lower Pliensbachian (189.6 - 183.0 Ma)

• Carixian

Environment/lithology: shallow subtidal; gray limestone

• in this unit predominate thick-bedded, medium grey, grey, dark grey and very dark grey prevalently sparitic limestones containing benthic foraminifer Orbitopsella. In considered limestones occur sporadic interbeds of breccia, oncoid, gastropod and megalodontid limestones. In this unit can also be seen a certain rhythmism of sedimentation, since there is present an alternation of micritic sediments (mudstone/wackstone) with sediments of packstone/floatstone

•and grainstone/rudstone type that contain oncoids, intraclasts, small megalodontids, gastropods and horizons of oolitic limestones, benthic foraminifers and green algae, above all dasyclads. The rhythmic sedimentation

•is a consequence of sea-level oscillation.

• Bedded micritic (mudstone) limestones

Size classes: mesofossils, microfossils

Primary reference: S. Dozet. 2009. Lower Jurassic carbonate succession between Predole and Mlačevo, Central Slovenia. Materials and Geoenvironment 56(2):164-193 [W. Kiessling/M. Krause/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 146866: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 01.07.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Linoporella (Tersella) lucasi
Gastropoda
 Heterostropha - Nerineidae
Nerineidae indet.
Nerineidae indet. Zittel 1873 snail
Bivalvia
 Pectinida - Pectinoidae
Pectinidae indet.
Pectinidae indet. Wilkes 1810 scallop
 Megalodontida - Megalodontidae
Megalodontidae indet.
Megalodontidae indet. Morris 1853 clam
 Carditida - Astartidae
Opisoma sp.
Opisoma sp. Stoliczka 1871 clam
Cyanophyceae
  -
Cayeuxia sp.
Cayeuxia sp. Frollo 1938
Chlorophyceae
 Dasycladales - Dasycladaceae
Palaeodasycladus mediterraneus
 Thaumatoporellales -
Thaumatoporella parvovesiculifera
Foraminifera
 Involutinina - Involutinidae
Involutina farinacciae
 Lituolida - Lituolidae
Lituosepta recoarensis, Orbitopsella praecursor
Globothalamea
 Loftusiida - Spirocyclinidae
Haurania deserta
Nodosariata
 Vaginulinida - Vaginulinidae
Lenticulina sp.
Lenticulina sp. Lamarck 1804
Foraminifera
  -
Planisepta compressa
 Loftusiacea - Cyclamminidae
Pseudocyclammina liassica
 Ammodiscoidea - Ammodiscidae
Glomospira sp.
Glomospira sp. Rzehak 1895
  -
Agerina martana
Agerina martana Farinacci 1991
 Fusulinina - Earlandiidae
Aeolisaccus dunningtoni
Paleomayncina termieri
  -
Paleomayncina termieri
Paleomayncina termieri Hottinger 1967