@ActionWolf,



Nobody at Princeton could help you??? It looks a lot like Holocene aged "worm tubes" (Tubifex etc, ) See a copy of the Treatise of Invertebrate Pqleontology at the Princeton Library.I cant give you an exact name but I think I can tell you HOW to locte it in timeI dont understqnd the need for a spectrophotometer. I would suggect you have someone make a THIN SECTION across a "tube" and see whether theres a "cast shell" and then see what the interiror structure (seems to be uniform SAND. Look at the thing under polarized light qnd see wht the minerl mkeup isThis area of NJ is well known for acid deposition minerals and fossils from the late Pleistocene into the Holocene. SOme of the Minerql thqt one finds in associqtion with this kind of deposit is MARCASITE "cockscomb pyrite" (The deposition of marcasite is from low temp acidic waters. SO, If you did a THIN SECTION of the "tubes" and the surface is seen to be something like Aragonite, that would go along with a period of acid seas and carbonate deposition (Actually its just chemical buffering) in an Aragonite Xl matrix and its usually acompanying some Marcasite "discs"I used to find stuff like this along the northern coastal plin regions of NJ. Wed find gray and green sand deposit with these fossiliferous lyers in between.