Fossils in Choshi Peninsula

May 1, 2002

This corner introduces some fossils that we gathered at the Choshi Peninsula, Chiba-Prefecture, Japan which is located about 100 km south-east direction from Tokyo. The formation in this area consists of two different layers of which Pliocene (5 million years ago) and Cretaceous (140 million years ago) epochs. Due to my poor knowledge, many of the fossils here are still unidentified at the moment. So, if you would send us any of your comment, we would appreciate you very much. Thank you. by Watacchi

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** VERTEBRATA (CRANIATA) **
Ear-bone of a whale	Ear-bone of a dolphin	Bone of vertebrata unidentified	Shark-tooth Carcharodon megalodon	Shark-tooth Carcharodon carcharias	Shark-tooth Carcharodon carcharias
CH029	CH005	CH011	CH004	CH012	CH013/CH027
Shark-tooth Carcharhinus sp.	Shark-tooth Carcharhinus sp.	Shark-tooth Carcharias sp.?	Shark-tooth Carcharodon carcharias	Tooth of a fish Diodon sp.	Shark-tooth Carcharodon carcharias
CH014	CH015	CH016	CH017	CH018	CH019
	Reserved	Reserved	Reserved	Reserved	Reserved
Shark-tooth Isurus oxyrinchus NEW
CH031
** MOLLUSCA **
A shell unidentified	A shell Chlamys farreri farreri (Jones et Preston) ?	A shell unidentified	A shell unidentified	Ammonite Puzosia Subcorbarica	Ammonite Mortoniceras sp.?
CH002	CH007	CH009	CH022	CH020	CH030
** BRACHIOPODA & ANNELIDA **
					Reserved
A brachiopoda Dallina raphaelis (Dall) ?	A brachiopoda unidentified	A brachiopoda Terebratulina miuraensis Hatai ?	A brachiopoda Tegulorhynchia doederleini (Davidson) ?	Protula sp.
CH003	CH006	CH008	CH021	CH010

Other Teeth of Shark Bones of Vertebrate Shark-Tooth Damaged