The San Lorenzo Formation is a Dapingian geologic formation of southern Bolivia. The dark gray, greenish, and black

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...

with thin intercalations of white-yellow quartzites were deposited in an open marine

submarine fan Abyssal fans, also known as deep-sea fans, underwater deltas, and submarine fans, are underwater geological structures associated with large-scale sediment deposition and formed by turbidity currents. They can be thought of as an underwater ve ...

environment.Camargo Syncline 2
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Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

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Fossil content

The formation has provided the following fossils: * '' Didymograptus nitidus'' * '' Dinorthis obispoensis'' * '' Orthambonites calligramma'' * '' Peelerophon oehlerti'' * '' Tetragraptus quadribrachiatus'' * '' Thysanopyge argentina'' * '' Yutagraptus vdeflexus'' * '' Phyllograptus cf. typus'' * '' Dictyonema sp.'' * '' Endoceras sp.'' * '' Lecanospira sp.'' * '' Megalaspidella sp.'' * '' Pachendoceras sp.''

References

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Fossil content

See also

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Further reading