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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Conularida indet.
Crinoidea
Crinoidea indet. Miller 1821
Pterobranchia
Graptolithina indet. Bronn 1849
Hyolithida
Hyolithida indet. Mathew 1962
Strophomenata - Strophomenida - Strophochonetidae
? Protochonetes sp. Muir-Wood 1962
Strophomenata - Strophomenida - Leptestiidae
Leangella sp. Opik 1933
Strophomenata - Strophomenida - Leptostrophiidae
Castellaroina sp.
Rhynchonellata - Rhynchonellida - Leptocoeliidae
Harringtonina sp. Boucot 1972
synonym of Anabaia
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Ancillotoechia cooperensis
Rhynchonellata - Rhynchonellida - Eatoniidae
Clarkeia ovalis
Rhynchonellata - Orthida - Heterorthidae
Heterorthella zaplensis
Tentaculitida
Tentaculitida indet. Ljaschenko 1955
Cephalopoda - Orthocerida - Dawsonoceratidae
Dawsonoceras sp. Hyatt 1884
Gastropoda
Pleurotomariacea indet. Swainson 1840
    = Gastropoda indet. Cuvier 1795
Wagner 2023
Gastropoda - Bellerophontida
Bellerophontacea indet. M'Coy 1851
    = Bellerophontoidea indet. M'Coy 1851
Wagner 2023
Gastropoda - Murchisoniina - Murchisoniidae
Murchisoniidae indet. Koken 1896
Gastropoda - Murchisoniina - Loxonematidae
Loxonematidae indet. Koken 1889
Bivalvia - Nuculanida - Malletiidae
Myoplusia sulcata
Bivalvia - Nuculanida - Cucullellidae
Nuculites sp. Conrad 1841
Bivalvia - Nuculida
Nuculoida indet. Dall 1889
corrected as Nuculida
Bivalvia - Nuculida - Praenuculidae
Praenucula plicata
Bivalvia - Nuculida - Cardiolariidae
Deceptrix elongata
Deceptrix subtrigonalis
Bivalvia - Solemyida - Ctenodontidae
Ctenodonta sp. Salter 1852
Praectenodonta alternata
Bivalvia - Cyrtodontida - Antipleuridae
Dualina sp. Barrande 1881
Trilobita - Phacopida - Homalonotidae
Trimerus (Trimerus) grandis
Trimerus (Trimerus) flexuosus
Trilobita - Phacopida - Calymenidae
Flexicalymene sp. Shirley 1936
Diacalymene subandina
Calymene ferrifera
Trilobita - Phacopida - Phacopidae
Zaplaops zaplensis
Ananaspis sp. Campbell 1967
Trilobita - Phacopida - Dalmanitidae
Dalmanites sudamericanus
Dalmanites transglabelaris
Trilobita - Phacopida - Calmoniidae
Australoacaste palpalensis
Jujuyops nonoctubrensis
Trilobita - Lichida - Lichidae
Lichas cf. affinis Angelin 1854
Trilobita - Odontopleurida - Odontopleuridae
Anacaenaspis sp. Bruton 1967
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
Anthozoa - Favositida - Micheliniidae
Pleurodictyum sp. Goldfuss 1829
Similodontidae
Australonucula mesocarinata
see common names

Geography
Country:Argentina
Coordinates: 24.0° South, 65.0° West (view map)
Paleocoordinates:49.3° South, 128.8° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Silurian
10 m.y. bin:Silurian 2
*Epoch:Wenlock - Ludlow
Key time interval:Wenlock - Ludlow
Age range of interval:433.40000 - 423.00000 m.y. ago
* legacy (obsolete) database fields
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:2006-09-15 15:14:05
Access level:the public Released:2002-08-27 11:24:09
Creative Commons license:CC BY
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]