Jydegaard Formation
Danish geologic formation
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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]
| Jydegaard Formation | |
|---|---|
| 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 | 55.1°N 14.8°E |
| Approximate paleocoordinates | 47.2°N 21.4°E |
| Region | Bornholm |
| Country | Denmark |
  Jydegaard Formation (Denmark) | |
Fossil content
Thin bone fragments have been uncovered that may belong to pterosaurs or birds.[1]
Dinosaurs
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] |
  | |||
Crocodylomorphs
Fish
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]
Turtles
Unidentified turtle carapaces have been uncovered in the Formation.[1]
Lizards
A lower jaw from a lizard has been recovered from the formation.[1]
Bivalves
| 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; |