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Found 31 results

  1. My wife and I went on a 7500+ mile ramble to break out of our COVID doldrums. Due to the virus we had to change up many of our original plans... which conversely added a number of additional fossil hunting locals as they allowed us to mostly avoid our fellow humans and maintain social distancing by many many miles. As part of our trip preparations my wife sewed us a number of masks, including a whole series of fossil hunting masks for me. Originally we were supposed to stay in Chicago, but we elected to avoid staying in the city, so we only got to do a drive by We started the trip with a bonus dig, meeting up with fellow forum member @minnbuckeye for a guided Ordovician hunt in Fennimore, Wisconsin (THANKS MIKE!) Unfortunately I neglected to take pics of the site so I will only be able to share a farm pic we passed on the way. Mike was a gracious host who kicked off the visit with a gift of several fossil samples from his home turf As with all of the fossils from this trip, all finds are as they arrived back home, no prep. Some of our finds from Fennimore:
  2. From the album Cephalopods Worldwide

    11cm. Pierre Shale Formation Campanian Late Cretaceous Found near Glendive, Montana, USA Thanks to Ron (RJB) for the raw material.
  3. A Hoploscaphites from Ron

    RJB offered an unprepped Hoploscaphites from the Pierre Shale of Montana a while ago which he was gracious enough to send to me, although he normally doesn't ship overseas. Thanks again, Ron! It arrived a couple of days ago and I could hardly wait to get down to it since I've had these on my bucket list for ages. You can see the stage he had it at in the link. Here's how it looked in my cabinet after a few hours with the stylus. It turned out that the smaller one at the front was just a partial, and since there was nothing much else except broken shell material to be found in the concretion, I decided to remove the ammonite completely from the matrix. This is the stage it has reached after roughly 10 hours of work. My abrader has unfortunately broken down and I've had to send it off for repair, so this beauty shall have to wait for a while before I can finish it off.
  4. I won't get to do much posting from the road, but since Mike opened the door showing off some of the wisconsin ordovician finds he found and helped my wife and I collect, I figured I would add a teaser from Glendive, Montana where I finally found my first ammonites in the Pierre shale south of town. This little guy was one of my favorite singles because its exposed on one side and completely encrusted with yellow selenite crystals on the other. I will take some clearer pics once we get home and get pieces cleaned up a little
  5. Ammonites!!!

    I finished up a prep of a nice double ammonite block that I got from the illustrious @RJB as part of a larger trade for a trailer load of smoker wood last year. I think Ron said these were from the Pierre Shale. Is that right Ron? If so, does anyone know the ID? I don’t know these ammonites well. Here they are, happily atop my antique dental cabinet. Don’t judge my photography too harshly.
  6. Fluorescent Bacculites.jpg

    From the album Fossil Flourescence

    I was playing around with the UV lamp in my lab, seeing what might unexpectedly glow this afternoon. This was a nice surprise. It's an internal mold of Bacculites sp. with sutures that fluoresce orange under 345nm UV light. Bright orange like this usually indicates calcite, a mineral that makes up fossil shells and some modern ones, too. Between the mud-filled chambers, the shell was preserved while the exterior of the cone wore away. The shell material was either calcite to begin with or, more likely, began as aragonite (same chemical compound as calcite, but different crystal structure and glows yellow instead of orange) and changed over millions of years to the more stable configuration of calcite. Meanwhile, the mud looks like it may have a little bit of some fluorescent minerals in the mix, but it's mostly a daylight-only affair. The blue may be some residual glue from a label. This specimen is from the late Cretceaous Pierre Shale Formation in South Dakota.

    © C. 2020 Heather J M Siple

  7. I've been looking for hesperornis fossils for a while, and recently, an acquaintance presented me with a challenge: He would send me a bag of broken up hesperornis verts for me to assemble. In return, I had to send him the biggest and best vert back. He also warned me it could be a real headache. I took the challenge. Lo and behold! I was presented with over 60 broken pieces, some of which were tiny and terribly fragmented (not shown in picture) Nonetheless, I googled for pictures of hesperornis verts and put what limited knowledge I had on fossil assembly into this task. After 18 hours, this is what I got: All in all, it was a tiring but satisfying job and now I can happily say I am the proud owner of a chain of associated hesperornis verts
  8. First time or second time in my intire fossil hunting life where I canceled on a trip. My son is a bit lucky cause he has a father who has connections. anyways, he took off for several days and went to a few different formations and I have to say,,, did extreamly well!!! Here are some photo's of some exraordinary fossils!!! Just a few pics,, more to come. RB Holy Cow!!! and yes, he's got the other side to make this a very large and complete Sphenodiscus!!! A super nice spheno!!! This one is going to be freakin gorgeous!!! Gunna take some work but this is the color that is good as it gets!!! Plus lots more in the rock! This one is the one I want!!! This one is special and is a very nice female spedini and a very special nicolleti! along with some other stuff!!! This looks to be a super nice medium sized sphenodiscus!!! This is a part of a big conc from the Pierre shale. Lots of stuff in these! Same concretion. Same concretion. A puzzle but gunna be fun. A bit beat up on the outside of the concretion, but could be a super good b-grade ammonite!!!?
  9. After practically years of scouting properties in my area, I’ve finally found a decently productive site. To start, will just be some neat info about the site.
  10. My most recent Pierre shale find

    Here’s one a friend and I have been trying to settle for a little while. One end of the argument is that this is an unusual rock carried off the mountains by glaciers. the other end is that this is a heavily eroded bivalve.
  11. Pierre Shale, South Dakota Help

    It is so cold in the Chicagoland area I decided to go through fossils that I have not looked at in years. I came across a little container that contained a couple items that I collected back in the early 90’s. I am 99% sure that I collected thenm from the Pierre Shale along I-90, West of Wall Drug. I know there is a small portion of an Ammonite, but I wonder about the other pieces. I believe they all came out of the same concretion.
  12. I saw reference to something called "acid prep" for oil shale fish.... never heard of it, and would like to know more: what kind of "acid", and how is it used. ALSO-- I mainly want info on the prep of fish found in cretaceous Pierre shale-- the black, crumbly stuff. Anyone? Thanks!
  13. I cant do any fossil hunting anymore, but i can still prep. My youngest son is a real fossil hunter go gitter. He finds lots of stuff like his father used to do. He worked on this and then called me and asked if I would help out. He has a ME9100 that I gave him and he knows that I have a Junior Jack. A Junior Jack will remove 10 times the rock the 9100 will do. wish I had a before photo, but afraid not. Took me about 7 hours to get this far. Lots and lots of rock to remove. The appature on this Placenticeras is not correct but it was shaped in order to remove rock to expose this male Hoploscaphites crassus? My son May have a before picture. If so, I will post it and then you will understand why ive done what ive done. This rock measures 12 inches. Kinda heavy too! RB
  14. News About North Dakota's Plesiosaurs

    Jeff J. Person & Becky Barnes, 2018, New Plesiosaur Exhibit at Heritage Center State Museum. Department of Mineral Resources Geo News. 45(2) pp. 1-4. https://www.dmr.nd.gov/ndgs/documents/newsletter/2018Summer/New_Plesiosaur_Exhibit_at_Heritage_Center_State_Museum.pdf https://www.dmr.nd.gov/ndgs/newsletter/2018Summer.asp Clint A. Boyd, 2018, A Pleasing Discovery from North Dakota’s Ancient Seas. Department of Mineral Resources Geo News. 45(2) pp. 5-10 https://www.dmr.nd.gov/ndgs/documents/newsletter/2018Summer/A_Pleasing_Discovery_from_North_Dakotas_Ancient_Seas.pdf https://www.dmr.nd.gov/ndgs/newsletter/2018Summer.asp Yours, Paul H.
  15. Multi Ammo Rock

    I was moving some stuff around and doing a small bit of cleanup to make some room on my prep bench. Ran into a very nice little finished crab which i had forgotten about, and also ran into this multi ammo rock that ive been working on from time to time and then It got buried and forgotten. Put in about 3 hours of rock removal and its starting to look like something now. Its got a long ways to go still, but at least its finally gettin there. Where ever 'there' is. Ha!!! Anyways, I removed a heck of alot of rock from this rock after gluing it back together. Just glad I wasnt keeping track of the hours! RB
  16. Another Pierre Shale Ammonite

    Finished another one of the ammonites. This one went a lot easier than the first after having a little more practice. Seemed to have a little better separation too. This one was almost entirely with my CP scribe, and just a little clean up and rock smoothing with the Aro. Here is the before.
  17. Pierre Shale Coprolite

    Here is another coprolite. Wondering if the class of organism that defecated it can be determined. I found it in a particularly desolate (in terms of fossils) exposure of Pierre Shale (late cretaceous) in NW Nebraska. It was the only fossil I found in 2 hours of hunting. Pic to left shows close-up with fish bone inclusions. @GeschWhat
  18. New Finds From Pierre Shale

    Picked up several specimens during my exploration of what I believe to be a local outcropping of the Pierre Shale in Colorado Springs. A decently preserved Baculites for sure with nice sutures and an unknown fossil. Any help this one would be appreciated.
  19. took a recent trip to an old honey hole in the springs with reserved thoughts that it may...no longer exist. I was pleasantly surprised. When I was a kid it was essentially a mud hole and fairly exposed to the average passerby so I tried hard not to get my hopes up, plus it had been a while since I had attempted any type of fossil hunting. Following a creek bed, I pushed my way through surprisingly thick brush, thick with sticks and severely overgrown trees and bushes. Even the small game trails along the bank of the creek were difficult to discern. As I walked, my hopes began to climb and I started noticing strange wet, muddy, shale-like geology creeping up higher and higher along the river bank until a significant outcropping presented itself dead ahead of my line of sight. I immediately recognized several red-brown concretions sticking out of the wall of the muddy shale-like embankment. I pulled them loose, others unnoticed dropped to the ground and when I went to inspect I saw the dry creek bed below my feet littered with red-brown clam-like fossils. Many of the were poorly preserved in my newbie opinion but I began to hoard several on the side of the creekbed as I went back to dig out more and more. I began to notice that by following the small pockets of calcerous deposit in the muddy wall, soon to follow were more clams, some nicely preserved and covered in a brittle iridescent layer. Soon after I grew tired of pulling clams from the muddy wall, I looked up on the short, grassy cliff edge to notice a piece of some yet-to-be-identified ammonite. I picked it up and began digging carefully around it. My digging dislodged additional pieces of the ammonite and I began to speculate that it had fractured--its pieces scattered along a path nearby. I climbed up the short cliff face and walked up the grassy hill above, scanning the ground. I found a few more pieces of the same ammonite and was able to pull the largest piece from a nearby loose dirt wall. tine was running short so I carefully wrapped what I found interesting and brought it back to the car. Most of the specimens appear to be poorly preserved clams or maybe bubbles of mud? My research thus far has me suspecting the clams to be either inoceramus or ctenodonta. The ammonite, when assembled, appears to spiral up and away...difficult to describe, easier to see. I have a book that would suggest it to be turriltes but it lists the usual specimen size around 1 1/4". The partial specimen I have, when assembled is approx 4". A complete, similarly sized specimen would probably be around 6-10". Correct me here if I'm wrong and please, any advice, input, or insight would be greatly apprecoated. Thanks for reading More photos
  20. South Dakota Map

    (Posted in SD forum as well, feel free to move) I thought this would be an appropriate addition- my hope is that this map will allow forum users to plan trips to SD! Threw this thing together for you guys in some spare time at work. The map shows the extent of common fossil bearing strata in the state of South Dakota, as well as some "no-go" areas- reservations and the like. If you guys want a certain area zoomed in on let me know! FossilsSD.pdf
  21. Fossil Bearing units map

    Threw this thing together for you guys in some spare time at work. The map shows the extent of common fossil bearing strata in the state of South Dakota, as well as some "no-go" areas- reservations and the like. If you guys want a certain area zoomed in on let me know! FossilsSD.pdf
  22. Cant remember when I found this little beauty, but very little prep on this one. Im not sure but I think its a male Scaphites crassus? i left it in the rock, I like em that way. Nice and complete. RB
  23. I'm wondering if anyone has some good images that show the difference between the fox hills formation and underlying pierre shale formation? I've been reading geological report after report, but have been unable to find anything that shows a good picture of how I can tell the 2 formations apart when out in the field. I'm heading to Montana next month and have read Rockhounding Montana about 5x over, but there's not really any pictures that help differentiate the strata. I've also gone through several search engines for hours over the last 6 months too, to not much avail. I've got the geological maps of the area along with the BLM maps, but just would like to see a more real world photo. I would like to thank anyone in advance for their help.
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