Corona Formation

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Corona Formation
Stratigraphic range: Early Gzhelian
~303–302 Ma
↓
Monte Corona, Nomi. (BildID 15587370).jpg
Monte Corona, Austrian side
TypeFormation
Unit of
Underlies
Overlies
Thickness300 m (980 ft)
Lithology
PrimaryConglomerate
OtherSandstone, mudstone
Location
Coordinates46°30′N 13°18′E / 46.5°N 13.3°E / 46.5; 13.3Coordinates: 46°30′N 13°18′E / 46.5°N 13.3°E / 46.5; 13.3
Approximate paleocoordinates10°54′N 23°42′E / 10.9°N 23.7°E / 10.9; 23.7
Region
Udine
Country Austria
 Italy
ExtentCarnian Alps
Type section
Named for
Corona Formation is located in Austria
Corona Formation
Corona Formation (Austria)

The Corona Formation is a geologic formation of the Carnian Alps at the border of Austria and Italy. It preserves fossils dating back to the Gzhelian stage of the Late Carboniferous period.[1]

The 300 metres (980 ft) thick formation comprises deposited in a deltaic environment. The Corona Formation has provided fossils of fish, brachiopods, a bryozoan, an insect, fossil flora including trunks and ichnofossils ascribed to Limnopus. The tracks from the Corona Formation include the oldest record of tetrapod tracks from the Southern Alps.[2] The rugose coral Amplexus coronae was named after the formation.

Description[]

The Corona Formation was defined as a formation by Venturini in 1990.[3] It is the lowermost Gzhelian unit in the late Pennsylvanian , overlying the Kasimovian and overlain by the in the Carnian Alpine border region of Austria and Italy. The mountains , and the eponymous are composed of the formation. The formation is a 300 metres (980 ft) thick succession, characterized by alternating quartz conglomerates, sandstones and mudstones. The conglomerates are coarse infillings of distributary channels in a deltaic environment.[4] The formation is characterized by cyclothems (parasequences) of 30 to 40 metres (98 to 131 ft) thick.[5]

Fossil content[]

The Corona Formation has provided fossils of:[1]

The tracks of Limnopus from the Corona Formation represent the oldest record of tetrapod tracks from the Southern Alps.[2]

Flora[]

The formation has also provided abundant, well-preserved and diverse plant assemblages in coal-rich levels of up to 30 centimetres (12 in) in the fine sandstones and shaly levels of the Corona Formation. Therein, sphenophyte trunks with a diameter of up to 20 centimetres (7.9 in) are preserved in situ.[2] The genus , typically known from the Permian, is not found in other Carboniferous strata in the Alps.[14] The flora is of importance as one of the earliest examples of rebound after the Carboniferous rainforest collapse.

See also[]

References[]

  1. ^ a b Corona Formation at Fossilworks.org
  2. ^ a b c Kustatscher et al., 2018, p.38
  3. ^ Ronchi et al., 2012, p.305
  4. ^ Marchetti et al., 2020, p.35
  5. ^ Vai & Venturi, 1997, p.179
  6. ^ Dalla Vecchia, 1988, p.54
  7. ^ Brauckmann & Hahn, 1983, p.246
  8. ^ a b c Hubmann et al., 2003, p.67
  9. ^ a b Pecar, 1986
  10. ^ Ernst, 2005, p.70
  11. ^ Vachard & Krainer, 2001, p.186
  12. ^ Vachard & Krainer, 2001, p.188
  13. ^ Marchetti et al., 2020, p.37
  14. ^ Ronchi et al., 2012, p.308
  15. ^ a b c d e Ronchi et al., 2012, p.309
  16. ^ a b Kustatscher et al., 2018, p.39
  17. ^ Samankassou, 2003, p.205
  18. ^ Kustatscher et al., 2018, p.40
  19. ^ a b c Kustatscher et al., 2018, p.44

Bibliography[]

  • Marchetti, Lorenzo; Giuseppe Muscio; Fabio Massimo Petti; Gian Luigi Pillola, and Daniel Zoboli. 2020. The Carboniferous tetrapod ichnoassociation from Italy. 12. 31-39.
  • Kustatscher, Evelyn; Hendrik Nowak; Stanislav Opluštil; Josef Pšenička, and Luca Simonetto. 2018. The Carboniferous flora of the Carnic Alps - state of the art. 40. 33-47. ISSN 2038-0410
  • Ronchi, Ausonio; Evelyn Kustatscher; Paola Pittau, and Giuseppe Santi. 2012. Pennsylvanian floras from Italy: an overview of the main sites and historical collections. 65. 299-322.
  • Ernst, Andrej. 2005. Upper Palaeozoic Bryozoa in Carnic Alps, Austria (a review). Denisia 16. 69-74.
  • Hubmann, Bernhard; Susanne Pohler; Hans-Peter Schönlaub, and Fritz Messner. 2003. Paleozoic Coral-Sponge Bearing Successions in Austria. 61. 1-91.
  • Vachard, Daniel, and Karl Krainer. 2001. Smaller foraminifers, characteristic algae and pseudo-algae of the latest Carboniferous / Early Permian Rattendorf Group of the Carnic Alps (Austria/Italy). 107. 169-195.
  • Vai, Gian Battista, and Corrado Venturini. 1997. Moscovian and Artinskian rocks in the frame of the cyclic Permo-Carboniferous deposits of the Carnic Alps and related areas. Geodiversitas 19. 173-186.
  • Dalla Vecchia, F.M. 1988. First Record of a Petalodont (Petalodus ohioensis Safford, 1853) from the Alps. 9. 47-56.
  • Pecar, J. 1986. Upper Carboniferous and Permian mesolobid chonetacean brachiopods of Karavanke Mountains (Yugoslavia) and Carnian Alps (Italy). 28/29. 9-53.
  • Brauckmann, C., and G. Hahn. 1983. Ein Palaeodictyopteren-Flügel aus dem Ober-Karbon der Karnischen Alpen. 93. 245-251.
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