General Bruguer/Riacho Negro
Misiones Formation 
San Miguel Formation 
Cariy Sandstone 
Eusebio Ayala Formation 
Tagatiya Guazu Formation This is a list of fossiliferous stratigraphic units in Paraguay .
| Group | Formation | Period | Notes |
|---|---|---|---|
| General Bruguer/Riacho Negro | Pleistocene | [1] | |
| Misiones Formation | Aptian | [2] | |
| Independencia | San Miguel Formation | Artinskian | [3] |
| Cariy Sandstone | Telychian | [4] | |
| Vargas Peña Shale | Llandovery | [5] | |
| Itacurubi | Eusebio Ayala Formation or Ayala Sandstone | Hirnantian | [6] |
| Itapucumi | Tagatiya Guazu Formation | Ediacaran | [7] |
The Kimmswick Limestone is an Ordovician geologic formation in Arkansas, Illinois and Missouri. Fossils occurring in the Kimmswick include corals, bryozoans, brachiopods, conodonts, trilobites, crinoids and mollusks.
The Laketown Dolomite is a dolomite geologic formation in Nevada and Utah. It preserves fossils dating back to the Silurian period.
The Hassberge Formation is a geologic formation in Bavaria, Germany. It preserves fossils dating back to the Carnian stage of the Triassic period.
The Llallagua Formation is a Rhuddanian to Homerian geologic formation of western Bolivia. The formation comprises siliciclastic sediments. The fossil fauna suggests a warm water, nearshore current was active allowing northern hemisphere benthos to exist in the formation.
The Kirusillas Formation is a Homerian geologic formation of central Bolivia. The formation comprises black shales, overlies the Llallagua Formation and is overlain by the Pampa and Guayabillas Formations. The Kirusillas Formation is laterally equivalent to the Lipeón Formation. The formation is a potential source rock for shale oil and shale gas.
The Bertie Group or Bertie Limestone, also referred to as the Bertie Dolomite and the Bertie Formation, is an upper Silurian geologic group and Lagerstätte in southern Ontario, Canada, and western New York State, United States. Details of the type locality and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Database. The formation comprises dolomites, limestones and shales and reaches a thickness of 495 feet (151 m) in the subsurface, while in outcrop the group can be 60 feet (18 m) thick.
The Lipeón Formation is a Telychian to Pridoli geologic formation of southern Bolivia and northwestern Argentina. The formation comprises sandstones and siltstones. Plant fossils comprising rhyniophytes are scattered throughout, with some abundant concentrations on micaceous bedding plains. The fossil flora is the oldest of South America. Also present were quite diverse small, irregularly branching fragments possibly the tips of algae such as Buthotrephis or Hungerfordia.
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