Mineralized Bone Fragment / Fossilized Sloth or Whale Bone
Indeterminate large mammal cf. Megatherium or Cetacean • Body fossil (Vertebrate), likely permineralized bone
Geological Period
Pleistocene to Neogene (likely)
Estimated Age
0.01 - 23 million years
Preservation Type
Permineralization or replacement with heavy mineral leaching (phosphatic or iron-rich replacement)
Condition Assessment
Fair; heavily worn, fragmented, and incomplete with significant surficial erosion
Taxonomic Classification
Phylum: Chordata, Class: Mammalia
Morphological Description
Dark, dense, irregular mass with visible porous cancellous (spongy) bone structure. Surface shows heavy mineralization and weathering, with some possible suturing or articulation points obscured by erosion.
Rock Matrix
Minimal; free-standing specimen with possible remnants of dark alluvial silt or marine sediment
Formation & Location
Commonly found in Peace River formation (Florida) or coastal deposits globally
Size & Dimensions
Approximately 4-6 cm; typical for fragments of ribs or vertebrae from megafauna
Value & Rarity
Estimated Market Value
$10.00 - $30.00 USD
Auction Estimate
$15.00 - $40.00 USD
Rarity Assessment
Common; isolated bone fragments of this quality are frequently found in riverbeds and coastal sites
Scientific Significance
Provides information on Pleistocene/Neogene megafauna distribution and local taphonomic history of the deposit
Preparation Recommendations
Ultrasonic cleaning to remove surface debris; treat with Paraloid B-72 if crumbling; store in a dry, stable environment
Notable Features
Extreme mineralization giving it a rock-like density and weight; classic 'river-worn' texture common to Florida or coastal fossil hunting.