Orasoja Section. Sample 18 (Ordovician of Estonia)

Where: Estonia (59.4° N, 28.0° E: paleocoordinates 43.6° S, 7.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Paltodus deltifer pristinus conodont zone, Toolse Member (Türisalu Formation), Varangu (485.4 - 484.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, quartzose, sandy sandstone and lithified, black, silty shale

• Dark-brown thin-bedded Dictyonema Shale containing laminae and lenses of quartzose silt and sand. Rust-coloured lenses and thin layers of very fine-grained authigenic masses of silica and small pyrite concretions as well occur in the shale. The top of the bed is strongly eroded, with rather deep vertical burrows filled with glauconitic sandstone from the overlying Leetse Formation. The lower boundary is transitional.

Size class: mesofossils

Primary reference: H. Heinsalu, D. Kaljo, T. Kurvits and V. Viira. 2003. The stratotype of the Orasoja Member (Tremadocian, Northeast Estonia): lithology, mineralogy, and biostratigraphy. Proceedings of the Estonian Academy of Sciences Geology 52(3):135-154 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 204480: authorized by Pete Wagner, entered by Pete Wagner on 09.09.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Anisograptidae
Adelograptus cf. tenellus
Adelograptus cf. tenellus Linnarsson 1871 graptolite