Jydegaard Formation | |
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Stratigraphic range: Late Berriasian-early Valanginian ~ | |
Type | Geological formation |
Unit of | Nyker Group |
Sub-units | Rødbjerg & Tornhøj Members |
Underlies | Arnager Greensand Formation |
Overlies | Robbedale Formation |
Lithology | |
Primary | Claystone, sandstone |
Location | |
Coordinates | 55°06′N 14°48′E / 55.1°N 14.8°E |
Approximate paleocoordinates | 47°12′N 21°24′E / 47.2°N 21.4°E |
Region | Bornholm |
Country | Denmark |
The Jydegaard Formation (also spelled as 'Jydegård') is a geological formation dating to the Early Cretaceous, about 145–139 million years ago. It is on the island of Bornholm, Denmark. Vertebrate fossils have been found in the formation.[1]
Thin bone fragments have been uncovered that may belong to pterosaurs or birds.[1]
A tooth possibly belonging to a juvenile titanosaur has been found in the formation.[1]
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
D. bornholmensis[1] |
Two teeth and possible coprolites.[2] |
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
unknown |
Robbedale[1] |
A tooth tentatively referred to Pholidosaurus[3] |
Fish remains have been found in coprolites possibly belonging to the dromaeosaur Dromaeosauroides or marine turtles. Also, unidentified pycnodont jaws and two small stem-teleosteans have been uncovered. Amioid scales have also been revealed.[1]
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
L. sp[1] |
Robbedale[1] |
Teeth, jaws and scales[1] |
|||
unknown |
Robbedale[2] |
Teeth and scales[2] |
|||
P. rugianus[4] |
Robbedale[1] |
Teeth, finspines and head "hooks"[1] |
|||
P. serrata[5] |
Robbedale[1] |
unknown |
Unidentified turtle carapaces have been uncovered in the Formation.[1]
A lower jaw from a lizard has been recovered from the formation.[1]
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
Neomiodon[1] |
unknown |
Robbedale[1] |
many specimens[1] |
Neomiodon specimens are thought to be victim to a mass mortality such as poisoning.[1] |
|
unknown |
Robbedale[1] |
many specimens[1] |
Viviparus specimens are thought to be victim to a mass mortality such as poisoning.[1] |
Color key
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Notes Uncertain or tentative taxa are in small text; |