Terebratulid from Port Jervis formation

[GordonC]

This terebratulid,see tag,originally Rensselaeria Subglobosa Weller 1903 is a guide fossil to the Port Jervis formation . This interval of lower Devonian time is not represented elsewhere in the stratigraphic record in New York (background follows). From Montague NJ, about 3/4” specimens top, side and bottom right to left. Rock is about 5"x5" .

“The Port Jervis formation at the base of the group [Tristates Group] is found only near Port Jervis [in New York State].” “Except in southeastern New York there are unconformities above and below the Tristates Group.” ( Geology of New York , Y.W. Isachen et. al. Second Edition page 108).
L. V. Rickard ,1962 NYSM Bulletin 386 pg. 92, writes” At Kingston, the Connelly conglomerate of the Deerparkian (Oriskanian) Stage overlies the Port Ewen. Farther southward the Dalmanites Dentatus zone to which Chadwick (1908, pp346-48) applied the name Port Jervis limestone, gradually overlies the Port Ewen but is also referred to the Deerparkian Stage. It should be pointed out here that Nanothyris subglobosa, a guide to the Port Jervis....”

[Fossildude19]

Very cool brachiopods that I have not seen before!

Thanks for posting these, Gordon!

Regards,

[erose]

Well done.I am starting to really regret that i didn't put more effort into exploring those formations back when we had a cabin in Cragsmoor, NY. Those older papers are great resources. When I did live in the area I poked around a bit in the Otisville area. i even found some eurypterid material in the old RR quarry (now built over) but it was hard to find good exposures. I'm very impressed with the material you are sharing with us.

Take care,

Erich

[Jeffrey P]

Very interesting looking brachiopods. Not sure if we saw those when we were out a couple weeks ago. I notice the trilobite pygidium on the brachiopod slab. They're so abundant there. Thanks for posting.