Megafuanal Bone Fragment/Whale Bone Fossil
Cetacean indet. (comparison with whale or marine mammal bone) • Body fossil; Vertebrate skeletal fragment (Cortical and cancellous bone)
Geological Period
Neogene/Pleistocene (likely Miocene to Pliocene)
Estimated Age
2.5 to 15 million years
Preservation Type
Permineralization (specifically phosphatization), resulting in a dense, stony texture and dark coloration.
Condition Assessment
Fair; the specimen is a fragmentary limb or rib section that is heavily weathered and lacks diagnostic articular surfaces.
Taxonomic Classification
Phylum: Chordata, Class: Mammalia, Order: Cetacea (likely Superfamily Physeteroidea or Balaenopteroidea), Family/Genus: Indeterminate
Morphological Description
Irregularly shaped fragment exhibiting a dense outer cortical layer and a porous, pitted interior structure (trabecular/cancellous bone). The surface shows significant water-worn rounding and a black/dark grey phosphatic patina.
Rock Matrix
No remaining matrix; the specimen is an isolated water-rolled clast, likely recovered from a marine or fluvial lag deposit.
Formation & Location
Commonly found in the Bone Valley Formation (Florida, USA), the Calvert Formation (Maryland/Virginia, USA), or similar marine Neogene deposits globally.
Size & Dimensions
Approximately 3-5 cm in length; typical for comminuted megafaunal debris found in high-energy lag deposits.
Value & Rarity
Estimated Market Value
$5 - $15 USD
Auction Estimate
$10 - $20 USD (usually sold in bulk lots)
Rarity Assessment
Common; such fragments are ubiquitous in marine fossil lag deposits and beach wash-ups in regions like the Atlantic Coastal Plain.
Scientific Significance
Limited due to lack of diagnostic features; however, it indicates the presence of large marine vertebrates and high-energy depositional environments in the fossil's origin locality.
Preparation Recommendations
Requires no further mechanical preparation. Suggest desalination (soaking in distilled water) if found in saltwater, followed by consolidation with B-72 if brittle.
Notable Features
Distinctive 'honeycomb' internal texture representing fossilized marrow cavities; dark mineral staining caused by manganese and phosphate enrichment during fossilization.