tag:blogger.com,1999:blog-9210082840621538831.post7529530182099927578..comments2024-03-12T00:58:17.606-07:00Comments on Views of the Mahantango: OrbiculoideaDavehttp://www.blogger.com/profile/04692840427188426893noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9210082840621538831.post-8670334668707516682012-01-02T05:58:21.827-08:002012-01-02T05:58:21.827-08:00Jack - If I understand the stratigraphy well enoug...Jack - If I understand the stratigraphy well enough the New Scotland is a member of the Old Port formation in PA. It's above the Keyser (which is equivalent to the Coeymans, Manlius, Roundont and Decker limestones of NJ in descending order). The quarry I got these from was just south of Turbotville in Montour county. Based on the geological map in Google earth, the boundary between the groups is close but geographically far enough away that the rocks should all be considered Keyser and Tolonoway. I suppose the mapping could be wrong or there is some interfingering. I'm ordering a copy of the "Devonian System" from the W Va. geological survey. It sounds like a useful reference. - DaveDavehttps://www.blogger.com/profile/04692840427188426893noreply@blogger.comtag:blogger.com,1999:blog-9210082840621538831.post-20178547901171205872011-12-30T16:29:05.569-08:002011-12-30T16:29:05.569-08:00Dave - I've checked a number of references and...Dave - I've checked a number of references and can't find any "monoplacophoran" that are found in the Helderberg Group. For my two cents, it looks like an Orbiculoidea sp. Although it's hard to tell from the partial fossils, I'm thinking it might be "Orbiculoidea discus" which is mostly found in the New Scotland and not the Keyser FM. The "West Virginia Geological Survey - Vol XV /Devonian System" gives a fauna list which includes: "Orbiculoidea numulus" and Orbiculoidea schucherti" in Keyser LM. I can't come up with any good pictures of these two. Any possiblity that your quarry is in the New Scotland? Regards - Jack KeslingAnonymousnoreply@blogger.com