Mineralized Fossil Bone Fragment
Indeterminate mammalian fragment (cf. Artiodactyla or Sirenia depending on density) • Body fossil; vertebrate skeletal remain
Geological Period
Likely Quaternary or Neogene
Estimated Age
0.01 to 23 million years
Preservation Type
Mineral replacement and permineralization; likely high phosphate or iron content given the tan/brown coloration.
Condition Assessment
Fair; the specimen is heavily weathered, water-worn, and fragmentary with no articulatory surfaces preserved.
Taxonomic Classification
Kingdom: Animalia, Phylum: Chordata, Class: Mammalia (likely)
Morphological Description
A small, elongated fragment of mineralized bone showing distinct cortical (compact) bone on the exterior and more porous, weathered interior. One side exhibits longitudinal pitting or grooving which may correspond to nutrient foramina or internal vascular channels exposed by erosion. The shape is somewhat triangular in cross-section with rounded, water-worn edges.
Rock Matrix
None present; the specimen appears to be an isolated surface find or 'float' found in an alluvial or beach context.
Formation & Location
Likely found in fluvial deposits, coastal Pleistocene beds, or phosphate-rich formations such as the Peace River Formation in Florida, USA.
Size & Dimensions
Approximately 2-3 cm in length; typical for a water-worn splinter of a larger limb bone or rib.
Value & Rarity
Estimated Market Value
$2 - $10 USD
Auction Estimate
$10 - $20 USD (as part of a bulk study lot)
Rarity Assessment
Common; detached and worn bone fragments are frequently found in gravel pits, beaches, and riverbeds.
Scientific Significance
Low; as an isolated and non-diagnostic fragment, it provides evidence of past vertebrate presence in a locality but lacks the anatomical detail for precise taxonomic or evolutionary study.
Preparation Recommendations
Requires minimal intervention; gentle cleaning with water and a soft brush to remove surface salts or dirt. Stable enough for handle-testing.
Notable Features
Prominent elongated cavities resembling weathered vascular canals/marrow spaces and a warm, ferruginous patina indicating long-term mineral exposure.