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Found 18 results

  1. Whittington, H.B. and Evitt, W.R., 1953. Silicified Middle Ordovician trilobites (Vol. 59). Geological Society of America. https://pubs.geoscienceworld.org/books/book/65/Silicified-Middle-Ordovician-Trilobites (free download until June 30, 2020) Whittington, H.B., 1959, Silicified Middle Ordovician trilobites: Remopleurididae, Trinucleidae, Raphiophoridae, Endymioniidae. Bulletin of the Museum of Comparative Zoology at Harvard College. vol. 121, pp. 369-496. https://www.biodiversitylibrary.org/part/32962#/summary https://www.biodiversityl
  2. Croxen

    Silicified bone

    Found this any info is appreciated. No limestone and not much quartz in the area this was found. Everything about it is very hard and possibly silicified. Thanks Jason
  3. I_gotta_rock

    Fluorescent Silicified Cypress Wood

    From the album: Fluorescent Petrified Wood

    One of Delaware's many mysteries is the petrified wood found near Odessa and Smyrna. The general consensus is that is cypress wood of some kind and it was buried under Pleistocene sediments. However, the origin of the wood and the age have yet to be figured out. Some say Miocene. Others say as old as Cretaceous. There are no other co-occurring fossils in the deposit to give any clues. The photo on the right was taken using a 395 nm UV lamp.
  4. Hi, all, A friend over on the Facebook group "Great Lakes Rocks and Minerals" recently posted this little silicified pebble she found along the shore of Lake Michigan, northern lower peninsula. The tiny pores got several of us on the group curious about whether we could narrow down a possible ID. Someone initially suggested heliolitid, but I think we ruled that out because there doesn't seem to be enough room between corallites for coenenchyme. We decided it must be some species of small-celled favositid, but is it possible to narrow beyond that? (My gut says probably not, since we
  5. Here is a compilation of two trips to the Payson, Arizona area last month. Early in May, I led a Saturday and Sunday trip for the Southwest Paleontology Society. Since everyone left by lunchtime on Sunday, I headed over to a local cave, Redman Cave, carved in the Devonian Martin Formation to look for nearby fossils. Although I have been in the cave twice, why go where you cannot collect fossils and you might not have enough oxygen to breath. The cave is connected to the disappearance of one of the FBI’s ten most want
  6. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  7. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  8. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  9. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  10. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  11. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. The black, crystalized material is probably dendrites. Miocene New Castle County, Delaware
  12. I_gotta_rock

    Petrified Wood

    From the album: Delaware Fossils

    Generally considered to be cypress wood, but there is some evidence for larger species in the Cupressaceae family. Miocene New Castle County, Delaware
  13. I_gotta_rock

    Baby, It's Cold Outside

    The hubbub of the holidays is over. The cold, crisp air has descended here in the Mid-Atlantic. The ground is frozen, but I was craving sunshine and the hunt. With blue skies today and the promise of snow tomorrow, I headed to the one place I was reasonably certain wouldn't be completely frozen -- the Delaware Bay. After all, we put salt on the roads here to keep them from freezing. How cold is it this week? Cold enough to freeze salt water! Here and there, exposed spots dotted the beach and the highest part of the bank, above the high tide line, was still exposed. There wer
  14. The holotype of Anisopyge cooperi Brezinski 1992 Brezinski, D.K. (1992) Permian trilobites from west Texas. Journal of Paleontology, 66(6):924-943 Öpik, A.A. (1967) The Mindyallan Fauna of north-western Queensland. Bureau of Mineral Resources, Geology and Geophysics, Bulletin, 74(1):1-404 PDF TEXT 74(2):1-167 PDF PLATES Öpik, A.A. (1970) Nepeid trilobites of the Middle Cambrian of northern Australia. Bureau of Mineral Resources, Geology and Geophysics, Bulletin, 113:1-47 PDF
  15. This post may hold the record for the longest setup time (unless you count the millions of years of "setup" that are the basis for most of the posts on this forum). The ultimate origin was when I first saw posts from Jim (coralhead) and John (Sacha) showing some stunningly gorgeous silicified fossil corals. This was a treasure to hunt for so unlike the black and gray shark teeth (and other fossils) I had been pulling out of the Peace River and I am always up for new experiences so I contacted the two of them through the forum. In addition to the incredibly encyclopedic knowledge brought to thi
  16. Now that there is a microfossils subforum, I thought I might gather various posts regarding some silicified micros I found recently.... Years ago, I collected a few nice gastropods that were silicified: Because they came from limestone, I figured I could extract many more with muriatic acid. Last summer, I collected some chunks of rock that contained the mollusks: This was the result of the acid bath: There weren't as many snails as I'd hoped, but I was intrigued by the fine detritus. Time to pull out the microscope.
  17. ted coulianos

    An Artifossil

    several recent posts regarding artifacts & their identificaton prompted me to dig this specimen out of moth balls: it's both artifact & fossil; the tip section of a chipped stone spear or knifepoint, with a little surprise. The planispiral coiled gastropod preserved in the marine chert or flint probably contributed to it's fracture. It would have been a great artifact had it been complete;only now it's been relegated to "conversation piece". Hope you find it interesting.
  18. Here are some Pennsylvanian gastropods I found years ago that are mostly free of matrix, which is unusual around these parts: Winterset Limestone Jackson County, Missouri They include Hypselentoma, Knightites, and one other that is too tiny to id. Because they are so pristine, I suspected that they were silicified. A scratch on a glass bottle confirmed it. The next thing that came to mind is that if I could find the limestone bed from which they came, I could extract some more with acid. I had returned to the exposure in the pas
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