sedimentary
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
Hardness: 5 (Enamel), 3 (Matrix); Color: Dark grey to black tooth, tan/grey sandy matrix; Luster: Vitreous on tooth, dull on matrix; Structure: Bio-apatite; Cleavage: None
- Hardness
- 5 (Enamel), 3 (Matrix)
- Color
- Dark grey to black tooth, tan/grey sandy matrix
- Luster
- Vitreous on tooth, dull on matrix
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Physical properties
Hardness: 5 (Enamel), 3 (Matrix); Color: Dark grey to black tooth, tan/grey sandy matrix; Luster: Vitreous on tooth, dull on matrix; Structure: Bio-apatite; Cleavage: None
Formation & geological history
Formed during the Paleocene to Eocene epochs (approx. 40-60 million years ago) in marine environments where teeth were buried in seafloor sediment and mineralized over time.
Uses & applications
Scientific study (paleontology), educational displays, and private fossil collecting. Larger or rare species are used in jewelry.
Geological facts
The Otodus shark was a prehistoric predator that eventually evolved into the Megalodon. This specimen appears to be the 'rootless' crown of a tooth still embedded in its host rock (matrix).
Field identification & locations
Identified by the smooth, dark, triangle-shaped enamel against a grainy sedimentary rock. Commonly found in the phosphate mines of Morocco or riverbeds in the Southeast USA.
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