Coprolite (Fossilized Dung)
Coprolithes sp.; specific producer cannot be identified without biochemical analysis or inclusion study • Trace fossil (Ichnofossil); non-skeletal organic remain
Geological Period
Likely Cretaceous or Paleogene based on morphology and mineralization
Estimated Age
Approx. 50 to 100 million years
Preservation Type
Permineralization (Phosphatization); replacement of organic matter with calcium phosphate (apatite)
Condition Assessment
Fair to Good; mostly complete but shows significant surface weathering and lack of distinct inclusions
Taxonomic Classification
Ichnophylum: Ichnotaxon; Kingdom: Animalia (Producer unknown, likely Reptilian or Mammalian)
Morphological Description
Irregular, bulbous to cylindrical mass with a rough, desiccated surface texture. Shows characteristic pinch-and-swell structures, faint striations, and a multi-lobed appearance indicative of intestinal extrusion.
Rock Matrix
Matrix-free or associated with Phosphatic Mudstone; the specimen itself acts as the primary lithified body
Formation & Location
Commonly found in the Wilkes Formation (Washington, USA) or the phosphate beds of Morocco
Size & Dimensions
Approximately 5-8 cm in length; typical for medium-sized vertebrate producers
Value & Rarity
Estimated Market Value
$15.00 - $40.00 USD
Auction Estimate
$20.00 - $50.00 USD
Rarity Assessment
Common; fossilized fecal matter is abundant in specific phosphatic lagerstätten
Scientific Significance
Provides critical data on ancient diets, digestive physiology, and trophic levels within prehistoric ecosystems
Preparation Recommendations
Dry cleaning with soft brushes; avoid water if the clay content is high. Consolidate with Paraloid B-72 if crumbling occurs.
Notable Features
Features a 'spiral' or folded morphology common in certain types of reptilian or primitive fish waste; exhibits high phosphate content characteristic of carnivore remains.