Lealt Shale

The Lealt Shale Formation is a Middle Jurassic geologic formation in Scotland. Fossil ornithopod, theropod and stegosaur tracks, a theropod dinosaur tooth and the pterosaur Dearc have been reported from the formation.^[1][2][3] The lithology consists of silty fissile mudstones with subordinate thin limestones.^[4]

Lealt Shale Formation
Stratigraphic range: Bathonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Thinly bedded limestones of the Lealt Shale formation overlain by Paleogene lava
Type	Geological formation
Unit of	Great Estuarine Group
Sub-units	Kildonnan Member, Lonfearn Member
Underlies	Valtos Sandstone Formation
Overlies	Elgol Sandstone Formation
Thickness	Between 45 and 50 m
Lithology
Primary	Mudstone
Other	Limestone
Location
Region	Europe
Country	Scotland
Extent	Inner Hebrides
Type section
Named for	Lealt, Skye
Named by	Harris and Hudson
Location	Cliffs east of Lonfearn (partial), Coastal exposure 2.5 km north of Kildonnan, Eigg (partial)
Year defined	1980
Thickness at type section	Lonfearn: 26 to 30 m (partial) Kildonnan: 23 m (partial)

Fossil content

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

Theropoda

Theropod of the Lealt Shale Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Theropoda Indet.	Indeterminate			Tooth

Pterosaurs

Pterosaurs of the Lealt Shale Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Dearc[5]	D. sgiathanach				A angustinaripterin rhamphorhynchid

Fish

Fishes of the Lealt Shale Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Archaeotolithus[6]	A. eiggensis				A ray-finned fish
	A. invernizziae
Leptolepis[6]	L. flexuosus				a leptolepid fish
	L. skyensis

See also

• Earth sciences portal
• Paleontology portal
• Dinosaurs portal

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with ornithischian tracks
    • Ornithopod tracks