Ristna cliff, Kurtna member (Ordovician of Estonia)

Where: Harju, Estonia (59.3° N, 23.7° E: paleocoordinates 33.0° S, 2.1° W)

• coordinate estimated from map

When: Kurtna Member (Kahula Formation), Keila (453.9 - 453.0 Ma)

• "D2 alpha", in Rõõmusoks (1959). PJW: Originally entered as "Keila Formation"

• member-level stratigraphic resolution

Environment/lithology: gray, yellow, argillaceous limestone

• micritic limestone

Size classes: macrofossils, mesofossils

Primary reference: L. Hints, T. Meidla, and J. Nolvak. 1990. Locality 2 : 4 Ristna Cliff. In D. Kaljo & H. Nestor (ed.), Field Meeting Estonia 1990, Excursion Guidebook 136-138 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 195554: authorized by Björn Kröger, entered by Björn Kröger on 13.08.2018, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Mastopora concava
  -
Mastopora concava Eichwald 1840
Crinoidea
 Eustenocrinida - Eustenocrinidae
Virucrinus cf. kegelensis Yeltyschewa 1966 Sea lily
 Myelodactylida - Iocrinidae
Ristnacrinus marinus Opik 1934 Sea lily
Strophomenata
 Billingsellida - Gonambonitidae
Estlandia pyron Eichwald 1840
Estlandia pyron silicificata
 Billingsellida - Clitambonitidae
Clinambon sp. Schuchert and Cooper 1932
Clinambon anomalus Schlotheim 1822
 Strophomenida - Sowerbyellidae
 Strophomenida - Strophomenidae
Strophomena sp. Rafinesque and De Blainville 1824
Rhynchonellata
 Pentamerida - Porambonitidae
 Orthida - Platystrophiidae
 Orthida - Harknessellidae
 Orthida - Dalmanellidae
Onniella sp. Bancroft 1928
 Orthida - Saukrodictyidae
Saukrodictya sp. Wright 1964
Trilobita
 Asaphida - Asaphidae
Asaphus (Neosasaphus) nieszkowskii Schmidt 1898 trilobite
 Phacopida - Pterygometopidae
 Phacopida - Encrinuridae
"Atractopyge dentata" = Cybellela dentata
"Atractopyge dentata" = Cybellela dentata Esmark 1833 trilobite