Английская Википедия:Diligencia Formation

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Шаблон:Infobox rockunit The Diligencia Formation (Td) is a geologic formation cropping out in the Orocopia Mountains in southern California. It preserves mammal fossils dating to the Late Oligocene to Early Miocene (Arikareean in the NALMA classification).[1]

Description

The non-marine Diligencia Formation, defined by Crowell in 1975, is composed of alluvial, fluvial, and lacustrine conglomerates, sandstones, siltstones and limestones. It contains interbedded basalt and andesite flows, dated by whole-rock and plagioclase K-Ar methods as ca. 24–21 Ma), and andesitic sills and dikes.[2][3]

Fossil content

The formation has provided the following fossils:[1]

Mammals

See also

Шаблон:Div col

Шаблон:Div col end

References

Шаблон:Reflist

Bibliography

  1. Перейти обратно: 1,0 1,1 Diligencia Formation at Fossilworks.org
  2. Coffey et al., 2019, p.481
  3. Canyon Spring at Fossilworks.org
  4. Woodburne & Whistler, 1973