Gosau Group

Geological group in Austria, Germany and Slovakia

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Gosau Group
Stratigraphic range: Late Cretaceous-Eocene ~90–50 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Rocks of the Gosau Group exposed in the Imster Muttekopf
Type	stratigraphic group
Sub-units	Eastern realm: Upper Gosau Subgroup - Piesting & Zweiersdorf Formations Lower Gosau Subgroup - Kreuzgraben, Maiersdorf & Grünbach Formations Western realm: Upper Gosau Subgroup - Ressen, Nierental & Zwieselalm Formations Lower Gosau Subgroup - Kreuzgraben, Schönleiten, Streiteck, Noth, Grabenbach, Hochmoos & Bibereck Formations
Overlies	Unconformity with folded and faulted Permian to Lower Cretaceous rocks
Thickness	2,200–2,600 m (7,200–8,500 ft)
Location
Coordinates	47°36′N 13°30′E / 47.6°N 13.5°E / 47.6; 13.5
Approximate paleocoordinates	32°06′N 15°36′E / 32.1°N 15.6°E / 32.1; 15.6
Region	Central Europe
Country	Austria Germany Slovakia
Extent	Gosau Basin, Limestone Alps
Gosau Group (Austria)

The Gosau Group (German: Gosau-Gruppe) is a geological stratigraphic group in Austria, Germany and western Slovakia whose strata date back to the Late Cretaceous to Eocene. It is exposed in numerous sporadic isolated basins within the Northern Calcareous Alps. It is divided into two subgroups, the Lower Gosau Subgroup which dates from the Turonian to Campanian, approximately 90 to 75 Ma and the Upper Gosau Subgroup which dates to the Santonian to Eocene, about 83.5 to 50 Ma. The formations within each subunit vary significantly between basins. The sequence is largely marine, but the Grünbach Formation represents a terrestrial deposit. Many of the units of the group are fossiliferous, typically providing marine fossils such as ammonites, though terrestrial remains including those of dinosaurs are known from the Grünbach Formation and Schönleiten Formation.

Fossil content

Among others, the following fossils have been described from the Gosau Group:

reptiles
Genus	Species	Presence	Notes	Images
Struthiosaurus	S. austriacus	Niederösterreich, Austria
Mochlodon	M. suessi		A rhabdodontid iguanodont
Rhadinosaurus	R. alcinus		Possible indeterminate ankylosaur remains
"Crataeomus"	C. lepidophorus		Later found to be synonymous with Struthiosaurus austriacus
"Crataeomus"	C. pawlowitschii		Later found to be synonymous with Struthiosaurus austriacus in partim
"Danubiosaurus"	D. anceps		Later found to be indeterminate ankylosaurian and Struthiosaurus austriacus remains in partim "Indeterminate fragments"
"Hoplosaurus"	H. ischyrus		Later found to be synonymous with Struthiosaurus austriacus
"Leipsanosaurus"	L. noricus		Later found to be synonymous with Struthiosaurus austriacus
"Pleuropeltus"	P. suessi		Later found to be synonymous with Struthiosaurus austriacus in partim
"Megalosaurus"	M. pannoniensis		Later found to be indeterminate theropod remains
Ornithocheiridae indet.
Mollusca
Genus	Species	Presence	Notes	Images
"Trochactaeon"	T. conicus'	Nördliche Kalkalpen, Niederösterreich, Austria	Very common fossil, rock forming