Lipeon Formation, Arroyo de los Tomates section: Wenlock - Ludlow, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pterobranchia
Crinoidea
Crinoidea indet. Miller 1821
Cephalopoda - Orthocerida - Dawsonoceratidae
Gastropoda
Wagner 2023
Gastropoda - Murchisoniina - Loxonematidae
Gastropoda - Murchisoniina - Murchisoniidae
Gastropoda - Bellerophontida
Wagner 2023
Bivalvia - Solemyida - Ctenodontidae
Ctenodonta sp. Salter 1852
Bivalvia - Nuculida
Bivalvia - Nuculida - Cardiolariidae
Bivalvia - Nuculida - Praenuculidae
Bivalvia - Nuculanida - Cucullellidae
Bivalvia - Nuculanida - Malletiidae
Bivalvia - Afghanodesmatida - Similodontidae
Bivalvia - Cyrtodontida - Antipleuridae
Tentaculita - Tentaculitida
Tentaculitida indet. Ljaschenko 1955
Hyolithida
Hyolithida indet. Mathew 1962
Rhynchonellata - Rhynchonellida - Eatoniidae
Rhynchonellata - Rhynchonellida - Leptocoeliidae
Harringtonina sp. Boucot 1972
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchonellata - Orthida - Heterorthidae
Strophomenata - Strophomenida - Leptostrophiidae
Strophomenata - Strophomenida - Leptestiidae
Leangella sp. Opik 1933
Strophomenata - Strophomenida - Strophochonetidae
? Protochonetes sp. Muir-Wood 1962
unclassified
Artiopoda - Phacopida - Phacopidae
Artiopoda - Phacopida - Calmoniidae
Artiopoda - Phacopida - Dalmanitidae
Artiopoda - Phacopida - Calymenidae
Artiopoda - Phacopida - Homalonotidae
Artiopoda - Lichida - Lichidae
Artiopoda - Odontopleurida - Odontopleuridae
Anacaenaspis sp. Bruton 1967
Anthozoa - Favositida - Micheliniidae
Pleurodictyum sp. Goldfuss 1829
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
see common names

Geography
Country:Argentina
Coordinates: 24.0° South, 65.0° West (view map)
Paleocoordinates:71.6° South, 174.5° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Silurian Epoch: Wenlock - Ludlow
10 m.y. bin: Silurian 2
Key time interval: Wenlock - Ludlow
Age range of interval: 432.9 - 422.7 m.y. ago
Stratigraphy
Formation:Lipeon
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:bioturbation,ferruginous,micaceous,gray siltstone
Secondary lithology:"cross stratification" sandstone
Lithology description: Lipeon Formation ranges in thickness from 600 to 800 m. It consists of a monotonous sequence of fine-grained sandstones and siltstones. The lower half of the unit is composed of yellowish, fine-grained, micaceous sandstones...Near the base are several hematitic beds...Ferruginous concretions throughout the formation...extensive bioturbation...trace fossils common. The upper half [relevant here] consists of about 350 m of bioturbated, dark gray, micaceous siltstones. The lower part of this member is richly fossiliferous. Toward the top of the formation there is a progressive increase in the percentage of sands, and discrete sandstone beds are interbedded with the siltstones. These beds show occasional flaser bedding and small-scale ripple cross lamination."
Environment:marine indet.
Geology comments: "offshore, quiet water, below wave base. Dark color and pyritic concretions suggest periodic restrictions in oxygen. Zoophycos may reflect muddy bottom rich in organics and partly anoxic. Sandstone beds toward the top indicate shallower, nearshore encironment affected by wave base." BA 3 (Boucot et al. 1999-PBDB ref. 7007).
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Table 5 (included separately because not all elements contained in collections 25060 and 25061).
Metadata
Database number:25062
Authorizer:M. Foote, P. Wagner Enterer:M. Foote, P. Wagner
Modifier:M. Foote Research group:marine invertebrate
Collections that are a subset of this one:25060, 25061
Created:2002-08-27 11:24:09 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-08-27 11:24:09
Creative Commons license:CC0
Reference information

Primary reference:
7023. T. M. Sanchez, B. G. Waisfeld, and J. L. Benedetto. 1991. Lithofacies, taphonomy, and brachiopod assemblages in the Silurian of western Argentina: A review of Malvinokaffric Realm communities. Journal of South American Earth Sciences 4(4):307-329 [M. Foote/M. Foote/O. Alfaro]

Secondary references:

9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]