Biohorizon in the Azygograptus lapworthi Biozone of the Muñayoc section (Ordovician of Argentina)

Also known as Muñayoc section

Where: Jujuy, Argentina (22.7° S, 66.1° W: paleocoordinates 42.7° S, 129.4° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Azygograptus lapworthi graptolite zone, Dapingian (470.0 - 467.3 Ma)

Environment/lithology: deep subtidal; volcaniclastic mudstone and volcaniclastic sandstone

• A 150-m-thick volcano-sedimentary succession that evidences an upward progression from mudstone-dominated dysaerobic outershelf deposits to sandstone-dominated deposition under storm and wave influence, with an upper sandier partrelated to a general regressive trend.

Size class: microfossils

Collection methods: quarrying,

Primary reference: B. A. Toro and N. C. Herrera Sánchez. 2019. Stratigraphical distribution of the Ordovician graptolite Azygograptus Nicholson & Lapworth in the Central Andean Basin (northwestern Argentina and southern Bolivia). Comptes Rendus Palevol 18:493-507 [E. Vlachos/N. Herrera Sánchez]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 214523: authorized by Evangelos Vlachos, entered by Nexxys Herrera Sánchez on 05.10.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Pterobranchia
 Graptoloidea - Dichograptidae
Azygograptus lapworthi Nicholson 1875 graptolite
 Graptoloidea - Phyllograptidae
Tetragraptus reclinatus Elles and Wood 1902 graptolite