00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin
00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin 00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin

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00480 - Well Preserved 5 Inch Hybodus Shark Dorsal Spine From Kem Kem Basin

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Species
Hybodus, Agassiz 1837
Age
Upper Cretaceous, Cenomanian stage, (~96 Million Years)
Location
Taouz, Kem Kem Basin, South Morocco
Formation
Aoufous Formation, Red Sandstone Beds
Size
127 mm   •    in
Weight
19 g   •    oz
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Description

Beautiful spine corresponding to the dorsal spine of this incredible shark that reigned the seas and the fluvial systems next to the coast during all the Mesozoic Era. It is a species of shark that presented particular features, such as this sharp spine in its flipper. The preservation of this piece is very good, and the strong and well defined longitudinal stretch marks can be observed. Its fossilization color has gorgeous orangish shades. It only has a series of small glued fractures towards the proximal area and close to the tip. This piece must have belonged to a relatively juvenile individual of this species.

The lithology of this body of sediment is characterized by the dominance of sandstones (also known as arenites) and fluvial gravel, of siliceous nature. Sometimes large concentrations of iron oxide are present, and then a small sample of that is usually present at the base of the tooth. These mineralizations are responsible for the wide range of beautiful reddish color tones, slowly drawn during millions of years via fossil-diagenetic processes. The complicated sedimentarian architecture of the layers where most large vertebrates are found makes the excavation methodology a real challenge. Sometimes the local miners have to excavate long tunnels that follow the distribution of the fossiliferous layer.

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