Where: Guadalajara, Spain (40.4° N, 3.7° W: paleocoordinates 55.8° S, 37.6° E)

• coordinate based on nearby landmark

When: Al-4 Member (Alcolea Formation), Helderbergian to Helderbergian (419.2 - 410.8 Ma)

• "The presence of eosteinhornensis s.l. Biozone conodonts well 400 m below the first fauna described here [i.e. fauna I] confines the pre-Devonian faunas [i.e. I-III and part of IV] to the latest Silurian." "probably the S-D boundary is situated withihn [fauna IV]"

• bed-level stratigraphic resolution

Environment/lithology: marine; silty sandstone and sandy shale

Primary reference: P. Carls. 1977. Spain. in A. Martisson, ed. The Silurian-Devonian boundary (IUGS, Series A, Number 5). Schweizerbarth'sche, Stuttgart. 143-158 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13931: authorized by Michael Foote, entered by Michael Foote on 03.05.2002

Creative Commons license: CC BY (attribution)