Shark Tooth fragment (likely Extinct Mackerel Shark or Carcharhinid)
Phylum: Chordata, Class: Chondrichthyes, Order: Lamniformes/Carcharhiniformes, Family: Various (Otodontidae or Carcharhinidae) · Non-mollusk; Fossilized vertebrate remains (Elasmobranchii) · Fossilized tooth (specifically a partial root or worn crown fragment); triangular/wedged shape.
Species
Carcharodon hastalis (ancestral mako) or Carcharhinus sp.
Shell Type
Fossilized tooth (specifically a partial root or worn crown fragment); triangular/wedged shape.
Family
Non-mollusk; Fossilized vertebrate remains (Elasmobranchii)
Size
Approximately 0.5 - 0.75 inches (1.3 - 1.9 cm). This is a small specimen, common for partial fossilized fragments found on beaches.
Color & Pattern
Dark charcoal grey to dull brown coloration. This dark color is a result of permineralization, where minerals like phosphate and manganese from the ocean sediment replace the original tooth material over millions of years.
Rarity
Common for fragments; complete teeth of specific species are more desirable, but worn fragments are ubiquitous in fossil-rich beach deposits.
Habitat
Ancient marine environments (Miocene or Pliocene epochs); modernly found as fossils in coastal shelf sediments and washed up on shorelines.
Geographic Range
Found globally; specifically common along the Atlantic Coast (Carolinas, Georgia, Florida) and Gulf Coast of the United States.
Description
This is a fossilized shark tooth fragment rather than a seashell. It exhibits a flattened, triangular profile with a heavily weathered surface. The edges are blunted and lack visible serrations, suggesting it has been tumbled by surf and currents for a long duration. The texture is stony and dense, characteristic of fossilized dentin and osteodentin.
Key Features
Triangular shape, flat profile, stony/mineralized texture, and characteristic jet-black or dark chocolate color distinctive of fossilized teeth compared to modern white teeth.
Collector Value
Low monetary value (less than $1). High sentimental and educational value as a 'beach treasure.' Large, intact Megalodon or Great White teeth are the primary focus of serious fossil collectors.
Condition Notes
Poor to Fair (fragmentary). It is missing the sharp tip (apex) and the distinct root lobes; the specimen is heavily eroded and 'water-worn.' Collectibility Grade: Low/Souvenir.
Interesting Facts
Sharks can lose tens of thousands of teeth in a lifetime. The dark color proves it is a fossil; modern shark teeth are white. This tooth is likely 2 million to 20 million years old.
Ecological Role
Historically, as a tooth, it served a predatory role in marine food chains. Modernly, these fossils provide critical data for paleontologists to map ancient ocean temperatures and species distribution.
Similar Species
Stingray mouth plates (more rectangular/gridded) or worn pieces of black phosphate rock (lacks the specific triangular symmetry).
Beach Finding Tips
Look near the 'black line' of debris at the high tide mark. Search in shell piles containing small, dark pebbles. Best found after storms or during low tide in areas like Venice Beach, FL or Myrtle Beach, SC.