Dinosaur footprint cast (Grallator track)
Grallator cf. tenuis • Trace fossil (cast)
Geological Period
Jurassic/Triassic
Estimated Age
145 to 200 million years
Preservation Type
Natural cast/artificial impression cast in fine sediment matrix
Condition Assessment
Good, clean surface details with sharp track outlines visible
Taxonomic Classification
Ichnofamily Grallatoridae, Ichnogenus Grallator
Morphological Description
Tridactyl (three-toed) tracks showing sharp claw impressions at the tips of slender digits, typical of small bipedal theropod dinosaurs.
Rock Matrix
Fine siltstone to mudstone matrix
Formation & Location
Portland Formation, Newark Supergroup, Eastern North America
Size & Dimensions
Approximately 10 cm in diameter, consistent with small coelurosaurian theropod tracks
Value & Rarity
Estimated Market Value
50 to 150 USD
Auction Estimate
75 to 200 USD
Rarity Assessment
Common
Scientific Significance
Provides crucial evidence for the presence, behavior, and locomotion of small carnivorous dinosaurs in ancient lacustrine and floodplain environments.
Preparation Recommendations
Keep in a dry environment with stable temperature and humidity; no intensive chemical preparation required.
Notable Features
Well-defined tridactyl impressions showing clear individual toe pads and sharp claw marks.