Sebayashi Formation

The Sebayashi Formation is a Barremian to Albian geologic formation in Japan.^[1] Dinosaur remains are among the fossils that have been recovered from the formation, although only two species, Fukuivenator and Siamosaurus, have been referred to a specific genus.^[2]

Sebayashi Formation
Stratigraphic range: Barremian-Albian ~125–100.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Sanchu Group
Lithology
Primary	Sandstone, shale
Other	Conglomerate
Location
Coordinates	36.1°N 138.8°E / 36.1; 138.8
Approximate paleocoordinates	48.4°N 140.0°E / 48.4; 140.0
Region	Gunma, Honshu
Country	Japan
Sebayashi Formation (Japan)

Paleofauna

Partial tooth of an indeterminate spinosaurid (KDC-PV-0003) and possible Siamosaurus tooth (GMNH-PV-999) from the Sebayashi Formation in the National Museum of Nature and Science, Tokyo

• Bivalvia indet.^[2]
• Dinosauria indet. - "Footprints"^[2]
• Ornithopoda indet. - "Footprints"^[2]
• Siamosaurus? - "Tooth (GMNH-PV-999)"^[2][3]
• Spinosauridae indet. "Tooth (KDC-PV-0003)"^[2]
• aff. Fukuiraptor kitadaniensis - "Tooth"^[4]
• Theropoda indet. - "Footprints"^[2]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with indeterminate dinosaur fossils