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Found 9 results

  1. So there was some talk about my recent needle preps and this Archimedes is on the same stone as the broken pygidium. The first photo is where it started. The others are where I currently am with it. I'm prepping at 30X zoom with sharpened sewing needles and hypodermic needles. It is a long process. But I can get some fine detail in the prep. I have 7 needles. Sharpened sewing needles. 1 wedge shape 1 four sided 2 cone shape Hypodermic 18 gauge 22 gauge 32 gauge 20220722_174254.jpg 20220722_174150.jpg
  2. Tammy and I made our first post-pandemic roadtrip and we went to Chicago to see family. Decided to drive as I was not yet comfortable with airports and airplanes. I had hoped to visit a site in southern Illinois where blastoids used to be plentiful and easy to find. Sadly, that site was mistreated and is no longer available. Members here on the forum suggested several alternatives which should produce the blastoids that I longed to hunt for. We found that the large (and well known) roadcut just north of Sulphur, Indiana was along the route (kind of) on our return trip and so it was added to the itinerary. We drove down from a last lunch in Chicago's Chinatown and crossed Indiana to check into a hotel in a small town just west of Louisville, Kentucky. The plan was to drive west to visit this Chesterian (Late Mississippian) site and see what we could find. We got up early, refueled, and had a quick breakfast since we planned on returning to the hotel and cleaning-up before the 11am checkout time. The morning proved to be much more overcast than the preceding evening. Things weren't looking promising as we were getting out to the site. You can see in the photos that the sky did not show promise of cooperating with us and the pelting rain along the highway was less than encouraging. The rain had slowed to a light drizzle and we arrived at the roadcut which provided nice wide shoulders to pull off the road a safe distance. Tammy decided she'd let me do the scouting and see if it was worth leaving the dry warmth of the car and so she stayed behind with her tablet to entertain her while I made good use of my raincoat. It took a while to find a good access point to climb up the first and lowest wall of this stepped roadcut. I walked most of the way down the road only to see the wall get taller and less accessible. I crossed over the road and walked back the way I had come till I found an opening. The rock face would have been easier to scale had it not all become quite slick from the rain. Once up on the first terrace level I walked along till I spotted a means of climbing up another level. I was headed up to the loose talus slope between the second and third levels. Along the way I spotted what I believe might be the Eastern Box Turtle (Terrapene carolina)--the shell patterns seem to be quite variable on this species but I'm sure @Tidgy's Dad could confirm or refute. When I finally started seeing crinoid stem segments and a number of small rugose corals I knew I had found the level I was looking for. It didn't take too long to spot the first blastoid looking like a pentagonally symmetrical marble. Most of the little Pentremites sp. blastoids were in the pea to garbanzo size range. Many of them were loose but a few were still attached to a chunk of the matrix. I spotted a little piece of the matrix that looked to be peppered with a bunch of semi-articulated plates from what I'm guessing is a crinoid calyx. This needs further inspection with the aid of some magnification. I took some in situ shots of my finds as I figured I'd probably write a post on this site. I selected a number of the nicer finds and upon review of the images I noticed that had missed things that I could clearly see in the images. I was so focused on developing the blastoid search image (rounded items with the pentagonally V-notched edge on the top) that I forgot that the Archimedes screw shaped bryozoans were also here. You can clearly see an Archimedes screw bryozoan actually touching the blastoid I picked up--talk about tunnel vision. https://www.uky.edu/KGS/fossils/fossil-month-09-2018-Archimedes.php The clouds were starting to break up and a little increase in light levels was welcome to aid the search. I could just barely see the car where Tammy was through the dense trees that cover this roadcut. I had tried to call her to let her know I hadn't fallen on my noggin yet but our cell phone reception was pretty poor here. Made a mental note to bring along some inexpensive walkie-talkie radios if we ever find ourselves split up and trying to communicate where cell phone coverage is poor. The rain had made the clay on the talus slope very soft and slippery. I spent a lot of time with multiple points of contact to the ground--holding on with both hands usually to avoid possibly losing my footing. Having my head held close to the ground in order to see the small blastoids obviously works better if you scan the area slowly. I knew I had limited time here and was searching somewhat quickly but I'm surprised that I missed this second blastoid just a hand-width away from the one on top that I did collect. It's also quite obvious (now) that I missed this other Archimedes that is nearly touching the blastoid underneath. At least I was getting pretty good at spotting even the tiniest of the blastoid specimens. I found a larger blastoid that had been flattened a bit and I spotted the first brachiopod. It was odd to see the brachiopods being so relatively rare as they were always so common at the few Devonian sites I'd hunted. I finally remembered that there were Archimedes at this site but only after I spotted this one. There is no telling how many more I missed. My time was running out and I was looking for one last find of the day before quitting and then trying to find a path back down (you never remember the path up as it looks different from above). Going down is usually more dangerous than up and so I spent extra effort looking for descents that wouldn't land me in the ER. Happily, the last find of the day was one of the largest of the blastoids. That seemed to put a cap on this 45 minute excursion into the Mississippian (my first fossil hunt from this geologic age). From up on top you can see the interchange with route 64 heading back to Lexington which is the route we took to arrive later that day in Asheville, North Carolina to visit friends we haven't see in 2 years. It was a fun little excursion and signs that a longer hunt would be even more productive. The fossil-bearing layer is about 2/3 the way up to the top of the slope. I spotted some better access points on the way back down and if I ever get back to this locality I hope to explore with with many more hours of time to dedicate to the hunt. Cheers. -Ken
  3. FossilNerd

    The Day of The Echinoderm

    Firstly, a big THANK YOU to @Jeffrey P for hanging out with me for the day! What a knowledgeable, generous, and all around swell guy! If you ever get the opportunity to hunt with Jeff, I highly encourage you to. Jeff and I met at around 8:30 am, and after a quick transfer of his gear to my truck, we were off. We first drove about 45 minutes south to the small town of Wax, to hunt the Upper Mississippian. Specifically to look for blastoids and crinoid calyxes that were known to be found in the area. As it happens, luck was with us! Unfortunately, I didn't take the field pictures that I typically do. Due to the fact that I went swimming with my phone a month or so ago . I am down to using my wife's old phone that I found in the junk drawer (Yes Jeff, it's pink... ). I didn't take it out much to avoid the inevitable drop down the hill side. Especially since it doesn't even have a protective case... Jeff snapped a few pictures. Maybe he will chime in and add them when he is able. For the first few minutes we didn't find much besides crinoid stems, bryozoans, and the deflated or crushed brachiopods common to the site. The main species of brach found in the area doesn't seem to have fared well during the fossilization process. Finding a nice inflated one is a rarity. After a few minutes of adjusting our eyes to spot the small finds located here, we started to pick out the blastoids. Jeff was the first to find one, and gifted it to me as he had already collected a few on his previous trips here. Thanks Jeff for gifting me my first blastoid! Most of the blastoids, while small, were whole and nicely preserved. Here are a few examples. I did happen to find the largest blastoid from the site, and one of the larger ones Jeff had seen from here. Super pumped about this one! Crinoid calyx were also to be found here. We only found a few, but being that these were also a first for me, I was extremely excited to find them! The brachiopods I previously mentioned were abundant, and besides crinoid stems, were the most abundant fossil to be found here. Again, they are almost always deflated. Finding a nice inflated one would be a real treat. These other little Spirifer(?) brachiopods could also be found. Although they were more uncommon that the previous ones. They are very small and delicate. Often crumbling when trying to pick them up. Bivalves could be found here also, but were extremely rare. Jeff was excited to find a couple, but I struck out. Other things that could be found were crinoid stems, the odd solitary rugose coral, and of course the ever present bryozoans. We then headed to a site a few miles down the road in Leitchfield. Stay tuned!
  4. Ludwigia

    Archimedes sp. (Owen 1838)

    From the album: Bryozoa

    5cm. long Bangor Limestone Formation Mississippian Early Carboniferous From Northern Alabama
  5. Big Hill (KY) geology and fossil expedition 11-2-2019 video link Kentucky Academy of Science Saturday afternoon activity: Quartz infilling identified by Dr. Frank Ettensohn, expedition host Stylolites identified by Dr. Frank Ettensohn Archimedes bryozoan identified by Mr. Daniel J. Phelps Mr. Phelps describes crinoid, brachiopod (Composita) and modern isopods=pill bugs or rolly pollies Crinoid stem columnals described by Darrell Barnes in rock detritus collection site (Mark Montgomery interacts) Dr. Frank Ettensohn identifies the spine of a crinoid by Darrell Barnes
  6. From the album: MY FOSSIL Collection - Dpaul7

    Bryzoan - Archimedes screw wrapped in Fronds Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period c 325,000,000 years ago Archimedes is a genus of bryozoans belonging to the family Fenestellidae. The first use of the term "Archimedes" in relation to this genus was in 1838. This genus of bryozoans is named Archimedes because of its corkscrew shape, in analogy to the Archimedes' screw, a type of water pump which inspired modern ship propellers. These forms are pretty common as fossils but they have been extinct since the Permian. Archimedes is a genus of fenestrate bryozoans with a calcified skeleton of a delicate spiral-shaped mesh that was thickened near the axis into a massive corkscrew-shaped central structure. The most common remains are fragments of the mesh that are detached from the central structure, and these may not be identified other than by association with the "corkscrews", that are fairly common. Specimens in which the mesh remains attached to the central structure are rare. Like other bryozoans, Archimedes forms colonies, and like other fenestrates, the individuals (or zooids) lived on one side of the mesh, and can be recognized for the two rows of equally distanced rimmed pores. Inside the branches, neighbouring individuals were in contact through small canals. Bryozoans are stationary epifaunal suspension feeders. The majority of fossils of this genus are distributed throughout Europe and North America, but they have also been found in sediments of Afghanistan, Canada, Russia, and Australia. Kingdom: Animalia Phylum: Bryozoa Class: Stenolaemata Order: †Fenestrida Family: †Fenestellidae Genus: †Archimedes
  7. Dpaul7

    Bryzoan, Large Archimedes.JPG

    From the album: MY FOSSIL Collection - Dpaul7

    Large Archimedes Bryzoan in matrix Bangor Limestone Formation, North Alabama, USA Mississippian Period c 325,000,000 years ago Archimedes is a genus of bryozoans belonging to the family Fenestellidae. The first use of the term "Archimedes" in relation to this genus was in 1838. This genus of bryozoans is named Archimedes because of its corkscrew shape, in analogy to the Archimedes' screw, a type of water pump which inspired modern ship propellers. These forms are pretty common as fossils but they have been extinct since the Permian. Archimedes is a genus of fenestrate bryozoans with a calcified skeleton of a delicate spiral-shaped mesh that was thickened near the axis into a massive corkscrew-shaped central structure. The most common remains are fragments of the mesh that are detached from the central structure, and these may not be identified other than by association with the "corkscrews", that are fairly common. Specimens in which the mesh remains attached to the central structure are rare. Like other bryozoans, Archimedes forms colonies, and like other fenestrates, the individuals (or zooids) lived on one side of the mesh, and can be recognized for the two rows of equally distanced rimmed pores. Inside the branches, neighbouring individuals were in contact through small canals. Bryozoans are stationary epifaunal suspension feeders. The majority of fossils of this genus are distributed throughout Europe and North America, but they have also been found in sediments of Afghanistan, Canada, Russia, and Australia. Kingdom: Animalia Phylum: Bryozoa Class: Stenolaemata Order: †Fenestrida Family: †Fenestellidae Genus: †Archimedes
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