San Fernando Quarry: Hirnantian, Paraguay

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Strophomenida - Leptostrophiidae
Eostropheodonta conradii (Harrington 1950)
Rhynchonellata - Athyridida - Meristellidae
Hindella cf. crassa (Sowerby 1839)
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
? Plectothyrella itacurubiensis n. sp. Benedetto et al. 2013
Rhynchonellata - Orthida - Heterorthidae
Arenorthis paranaensis n. sp. Benedetto et al. 2013
see common names

Geography
Country:Paraguay
Coordinates: 25.4° South, 57.3° West (view map)
Paleocoordinates:43.0° South, 142.8° West
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Hirnantian 10 m.y. bin:Ordovician 5
Key time interval:Hirnantian Graptolite zone: Normalograptus persculptus
Age range of interval:445.20000 - 443.80000 m.y. ago
Stratigraphy
Formation:Eusebio Ayala
Regional section:Itacurubı ́Group Regional bed:120 m
Regional order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:micaceous,red sandstone
Secondary lithology:micaceous,red siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: reddish micaceous sandstone grading upward to fine-grained fossiliferous sandstone and siltstone..... The shell beds yielding the brachiopods described in this study are confined to the upper part of the Eusebio Ayala Formation where they are interbedded with iron-rich levels (Fig. 2).
Environment:shallow subtidal indet.
Geology comments: Vertical burrows referred to Skolithos by Godoy Ciguel et al. (1987) are very abundant suggesting lower intertidal-shallow subtidal depositional settings.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: All specimens are housed in the Centro de Inves- tigaciones en Ciencias de la Tierra (CICTERRA), Consejo Nacional de Investigaciones Cientı ́ficas y Te ́cnicas, Univers- idad Nacional de Co ́rdoba (acronym CEGH-UNC).
Metadata
Database number:152547
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2013-11-25 14:32:54 Last modified:2013-11-25 21:34:07
Access level:the public Released:2013-11-25 14:32:54
Creative Commons license:CC BY
Reference information

Primary reference:
49109. J. L. Benedetto, K. Halpern, and J. C. Galeano Inchausti. 2013. High-latitude Hirnantian (latest Ordovician) brachiopods from the Eusebio Ayala Formation of Paraguay, Paraná Basin. Palaeontology 56(1):61-78 [P. Wagner/P. Wagner]