Ostøya, Frognerkilen Fm. (Ordovician to of Norway)

Where: Baerum, Norway (59.9° N, 10.6° E: paleocoordinates 32.1° S, 9.8° W)

• coordinate estimated from map

When: Diplograptus foliaceus graptolite zone, Frognerkilen Formation, Keila to Keila (453.9 - 451.8 Ma)

• 4bß

• formation-level stratigraphic resolution

Environment/lithology: marine; limestone and shale

• In the type area, the base of this formation marks an abrupt change from a shale dominated succession to rubbly limestones up to 10cm thick passing upwards into nodular limestones (up to 10cm) and shales (up to 35cm). The rubbly limestone is not developed in Ringerike. The uppermost 2 3m of the formation comprises bedded limestones (5 10cm) and shales (5 30cm)

Size classes: macrofossils, mesofossils

Primary reference: H. Soot-Ryen. 1960. The Middle Ordovician of the Oslo region, Norway: 12, Notostraca and Conchastraca. Norsk Geologisk Tidsskrift 40(2):123-131 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 164501: authorized by Pete Wagner, entered by Pete Wagner on 04.12.2014, edited by Björn Kröger

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rostroconchia
 Ribeirioida - Technophoridae
"Technophorus stoermeri n. sp." = Myocaris sharpei
"Technophorus stoermeri n. sp." = Myocaris sharpei Perner 1903
Bivalvia
 Solemyida - Ctenodontidae
Ctenodonta sp.2
Ctenodonta sp.2 Salter 1852 clam
Trilobita
 Asaphida - Asaphidae
Asaphus (Neoasaphus) ludibundus1
Asaphus (Neoasaphus) ludibundus1 Törnquist 1884 trilobite
1Jaanusson 1953; 2Soot-Ryen and Soot-Ryen 1960