Biohorizon in the Azygograptus lapworthi Biozone of the Muñayoc section: Dapingian, Argentina

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Pterobranchia - Graptoloidea - Dichograptidae
Azygograptus lapworthi Nicholson 1875
Pterobranchia - Graptoloidea - Phyllograptidae
Tetragraptus reclinatus Elles and Wood 1902
Lo Valvo et al. 2020
see common names

Country:Argentina State/province:Jujuy
Coordinates: 22.7° South, 66.1° West (view map)
Paleocoordinates:42.7° South, 129.4° West
Basis of coordinate:estimated from map
Geographic resolution:hand sample
Period:Ordovician Epoch:Middle Ordovician
Stage:early Middle Ordovician 10 m.y. bin:Ordovician 2
Key time interval:Dapingian Graptolite zone: Azygograptus lapworthi
Age range of interval:470.00000 - 467.30000 m.y. ago
Lithology and environment
Primary lithology:volcaniclastic mudstone
Secondary lithology:volcaniclastic sandstone
Includes fossils?Y
Environment:deep subtidal indet.
Geology comments: 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.
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Also known as:Muñayoc section
Database number:214523
Authorizer:E. Vlachos Enterer:N. Herrera Sánchez
Created:2020-10-05 11:16:33 Last modified:2020-10-05 11:16:33
Access level:the public Released:2020-10-05 11:16:33
Creative Commons license:CC BY
Reference information

Primary reference:

73980. 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]

Secondary references:

76896 G. A. Lo Valvo, N. C. Herrera Sánchez, and B. A. Toro. 2020. Early-Middle Ordovician graptolites from the Argentine Puna: quantitative paleobiogeographic analysis based on a systematic revision. Ameghiniana 57(6):534-554 [E. Vlachos/N. Herrera Sánchez/N. Herrera Sánchez]