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Tensleep Sandstone : ウィキペディア英語版 | Tensleep Sandstone
The Tensleep Sandstone is a geological formation of Pennsylvanian to very early Permian age in Wyoming. ==Trace fossils==
In 1932 Edward Branson and Maurice Mehl reported the discovery of a fossil trackway in the formation.〔 A new ichnospecies, ''Steganoposaurus belli'', was erected for these footprints.〔 The tracks were probably made by a web-footed animal slightly less than three feet long.〔 This creature was originally presumed to be an amphibian, but the toe prints it left behind were pointed like a reptile's rather than round like an amphibians. The actual trackmaker may have been similar to the genus ''Hylonomus''.〔 The ichnogenus ''Tridentichnus'' are similar footprints preserved in the Supai Formation of Arizona.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Tensleep Sandstone」の詳細全文を読む
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