Forni Dolostone

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Forni Dolostone
Stratigraphic range: Norian (Alaunian)
~216–212  Ma
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S
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Type Geological formation
Lithology
Primary Dolomite
Other Marl
Location
Coordinates 46°24′N12°36′E / 46.4°N 12.6°E / 46.4; 12.6
Approximate paleocoordinates 26°30′N16°00′E / 26.5°N 16.0°E / 26.5; 16.0
Region Friuli-Venezia Giulia
Country Italy
Type section
Named for Forni di Sopra
Italy relief location map.jpg
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Forni Dolostone (Italy)

The Forni Dolostone, also known as the Dolomia di Forni, is a Late Triassic (Norian, or Alaunian in the local biochronology) [1] [2] dolomite geological formation in northeastern Italy. The formation was deposited in a lagoonal to shallow marine environment. [3]

Contents

Description

It represents deposition in an anoxic marine basin whose maximum depth was about 400 metres (1,300 ft), and was surrounded by the shallow water carbonate platform of the Dolomia Principale Formation. The Dolomia di Forni is composed mainly of dark, often cherty, well-bedded dolostone that is frequently thinly laminated and sometimes slumped. Thicker laminae are graded and represent distal turbidites. The basinal facies preserving the tetrapod remains are composed mainly of distal turbidites and carbonate mud deposited by fallout. [3]

Fossil content

The following fossils have been reported from the formation: [3]

Pterosaurs of the Forni Dolostone
GenusSpeciesPresenceNotesImages
Austriadactylus [4] A. cristatus [4]
Austriadactylus.jpg
Preondactylus [1] P. buffarinii [1] Found near a small church in the Preone Valley of Udine Province [1] Found in a gastric pellet
Preondactylus NT.jpg
Seazzadactylus [5] S. venieri [5]
Seazzadactylus skull.png
Eudimorphodon [6] E. rosenfeldi [6]
Eudimorphodon.jpg
Other reptiles
Fish
Arachnids
Crustaceans
Flora

References

  1. 1 2 3 4 Wellnhofer, Peter (1991). "Summary of Triassic Pterosaurs." The Illustrated Encyclopedia of Pterosaurs. London, UK: Salamander Books Limited. p. 67. ISBN   0-86101-566-5
  2. ↑ Vecchia, Fabio Marco Dalla (1995-01-01). "Contribution to the conodont biostratigraphy of the Dolomia di Forni (Upper Triassic, Carnia, NE Italy)". Memorie Scienze Geologiche Padova.
  3. 1 2 3 Dolomia di Forni at Fossilworks.org
  4. 1 2 Wild, 1984
  5. 1 2 Dalla Vecchia, 2019
  6. 1 2 Dalla Vecchia, 1995
  7. ↑ Muscio, 1997
  8. ↑ Calzavara et al., 1981
  9. ↑ Tintori & Sassi, 1992
  10. ↑ Dalla Vecchia & Selden, 2013

Bibliography

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