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Found 11 results

  1. A Utah Trilobite

    We are just back from a delightful fossiling experience in Utah and Colorado. I want to share just one find now, an Elrathia Kingi from the U-Dig site outside of Delta. There are great descriptions of the quarry in other posts, with directions. I have been here before and always had a satisfying experience. The arrangement this year is that you can either locate yourself someplace in the quarry and break piles of shale the U-Dig folks have conveniently collected for you, or you can break shale out of the quarry yourself and then further split it to see what it might hold. You can break a lot of shale with modest success, so you have to be patient. But if you hit a productive layer it pays off. This is the largest trilobite I’ve found there, or for that matter, the largest I’ve found anywhere. The photo is of the quarry so you can get an idea of the terrain. And the views from the quarry down to the flats are dramatic. Going out there on the BLM road off Rt 50, I saw no sign to the New Dig site, another pay to dig site, which might be further up the road. U-Dig is open without reservation required whereas all the New Dig signs we saw in Delta said you needed a reservation. This is a great family activity and both days we were there this month had lots of kids enjoying the experience. It is big enough that no one need get in anyone else’s way.
  2. Happy holidays everyone. I would greatly appreciate help identifying the following specimen. It was collected in the Santa Susana Mountains of Simi Valley, Ventura County, California. It came from the Saugus or Pico Formation. Saugus is late Pleistocene to late Pliocene while Pico is middle Pleistocene to Pliocene. My uncertainty regarding the exact formation arises from the fact that (1) it was float material already weathered out of the formation it came from and (2) based on limited research and knowledge, I believe there has been a lack of consenus regarding differentiation of the two formations (see recent work by Richard Squires et al. in Valencia and R. Squires in Newhall). I assume it is marine since all of Pico is marine and Saugus is non-marine to marine. At first I thought it was a shark tooth when I picked it up but I threw that thought out the window when I realized it had three serrated edges. Measures 22 millimeters long and 6.5 millimeters wide. It is 4 millimeters tall on one end and 9.5 millimeters tall on he end that has the needle structure. There are three to four 'bumps' on both long sides on the end with the needle. The bumps look evenly spaced. I can and will do my best to provide additional info if needed.
  3. Itagnostus interstrictus

    Found during a trip out to a hill right adjacent to U-Dig Fossil Quarry. The trip report can be FOUND HERE. This is the largest I've collected. Typical sizes I've found are 3-6mm in length, 1-3mm in width.
  4. IMG_1819.JPG

    From the album Utah

    The larger Perenopsis on the plate.
  5. IMG_1817.JPG

    From the album Utah

    The smaller Perenopsis on the plate.
  6. IMG_1815.JPG

    From the album Utah

    Perenopsis multi-plate from U-Dig. @Kane an old timer to the site showed me were to find these and after a few hours I found a couple with 5+. I said I'd get you another one, but perhaps I could up the stakes for another E. rana. Stay tuned!
  7. Confusing shell mold

    I think this is basically a Mucrospirifer mold but what else is there ? Primarily the rugose feature. Pedicle attachment ?
  8. Elrathia kingii

    Collected on a field trip to U-Dig Utah and prepared at the U-Dig site station. After a light mechanical brush exposed the shale, mineral oil was applied with another brush for a polished finish.
  9. For those of you who have dreamed about Middle and Upper Cambrian trilobites in western Utah, this is the publication that will open the door to exploring. The Utah Geological and Mineralogical Survey has printed many well done booklets and books on Millard County, Utah. The intent was to draw in Petroleum Geologists to explore the general areas, but also provide a wealth of information to those interested in Paleontology and Cambrian Stratigraphy. To the west side you can even be directed to Triassic Ammonites, with Pennsylvanian and later outcrops also in the vicinity. The camping possibilities are everywhere. Some box canyons are wonderful... but trying to find a flat spot can be challenging. When I say flat... everything is either up hill... or down hill. You have the Topaz Mountains to the north, Dugway Geodes (good luck finding one...) and Pioche, Nevada mining areas further to the west. Excellent cheeseburgers in Pioche, by the way. The area is... wide open and lacks facilities. So gas up, water up, block ICE and get groceries in Delta. It might be 45 miles to this area... you can check it on the road map... but you cannot miss it. But... finding the right road(s) can be tricky as they split and take a different course quickly. My recommendation... look for the 100 foot power lines strung over the flat country and once you intersect them near shale outcrops... you have arrived. To the north is the U Dig site which is marked along the way as well, and cuts off to the right from some popular Middle Cambrian exposures. Geology of the Canyon, House and Confusion Ranges, Millard County, Utah by F. W. Christiansen & others, 1951.
  10. Asaphiscus Trilobite Delta Utah

    From the album Utah

    This is one of the finer specimens I collected that day. Unlike the other asaphiscus, this one has its horn plates missing. Nickel for comparison. The era is Cambrian (500 MYA).
  11. Peronopsis Trilobite Delta Utah

    From the album Utah

    This trilobite collection is from you-Dig in Delta Utah. These are peronopsis. You probably can't see the others in this far out shot, but there are other peronopsis surrounding the black fragment.
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