Where: Gotland, Sweden (57.3° N, 18.7° E: paleocoordinates 16.6° S, 2.2° W)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Polygnathoides siluricus conodont zone, När Formation (Hemse Group), Ludfordian (425.6 - 423.0 Ma)

• Hemse Beds, upper part, and as a fissure filling, Hemse Marl, southeastern part. The fissure filling represents the P. siluricus Zone, subz. 2.

• formation-level stratigraphic resolution

Environment/lithology: lithified marl

Size class: microfossils

Preservation: original phosphate

Collection methods: acetic, sieve

Primary reference: L. Jeppsson. 2005. Conodont-based revisions of the Late Ludfordian on Gotland, Sweden. Gff 127(4):273-282 [E. Jarochowska/E. Jarochowska]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 184314: authorized by Emilia Jarochowska, entered by Emilia Jarochowska on 21.02.2017

Creative Commons license: CC BY (attribution)