Where: Svalbard and Jan Mayen (80.0° N, 18.3° E: paleocoordinates 0.0° N, 0.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ryssö Formation (Roaldtoppen Group), Tonian (1000.0 - 850.0 Ma)

• Equivalent to the upper part of the Akademikerbreen Group. No direct age constraints from Svalbard, but chemostratigraphic correlations suggest a late Tonian age (<800 Ma).

• bed-level stratigraphic resolution

Environment/lithology: peritidal; lithified, stromatolitic, cherty/siliceous dolomite

Size class: microfossils

Preservation: permineralized, original carbon, replaced with silica

Collection methods: peel or thin section

• Repository: Harvard University Paleobotany Collection

Primary reference: A. H. Knoll and S. Calder. 1983. Microbiotas of the late Precambrian Ryssö Formation, Nordaustlandet, Svalbard. Paleontology 26:467-496 [P. Cohen/M. Hernandez/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 227770: authorized by Matthew Clapham, entered by Matthew Clapham on 29.10.2022

Creative Commons license: CC BY (attribution)