Road from Sogno to Colle di Sogno (Jurassic of Italy)

Where: Italy (45.8° N, 9.5° E: paleocoordinates 33.2° N, 18.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sogno Formation, Tenuicostatum (183.0 - 182.0 Ma)

• The first bed lies in the lower part of the Sogno Formation, about 1.1 m above the base. Ammonites belonging to the Tenuicostatum Zone were collected below and above the first level, allowing a precise assignment to the lowermost Toarcian.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, pyritic, carbonaceous claystone

• Clay and clayey marls in thin laminae, brownish with more carbonatic nuclei. Planar alignments of small pyritic crystals. The organic carbon was analyzed in a single rock specimen: the organic matter constitutes 1.29% of the whole rock.

Size class: macrofossils

Preservation: adpression

Collection methods: Repository: Istituto di Paleontologia Universiti degli Studi di Milano

Primary reference: A. Tintori. 1977. Toarcian fishes from the Lombardian basin. Bolletino della Società Paleontologica Italiana 16:143-152 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190202: authorized by Matthew Clapham, entered by Matthew Clapham on 02.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Pholidophoriformes - Pholidophoridae
Pholidophorus sp. Agassiz 1843
 Leptolepidiformes - Leptolepididae
 Pachycormiformes - Pachycormidae
Pachycormus sp. Agassiz 1843