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Found 14 results

  1. Looking to see if anyone is able to identify this as an Anomalocaris appendage? Measures approximately 60mm Middle Cambrian Latham Shale Marble Mountains, CA, USA Thanks in advance!
  2. Rcgutting

    Latham shale trilobites

    A recent trip to Cadiz , Ca and Latham shale trilobites- it’s absolute paradise with the desert vistas and train sounds. And trilobites. I was only able to visit one day this trip, but found a few incomplete. These few were especially fun. I really could stay for days… weeks. I wonder if anyone has found cast and mold trilobites specimens at that site. And I know this should probably go to the ID section… I think the first photo are tiny trilobite eyes?
  3. Hello! This is my first post. I'm happy to meet you all! I currently have a very modest fossil collection, but have been keeping my eyes peeled for some specimens that I was really excited about. I came across this fossil, which I was considering adding to my collection. It is described as a 200g fossil of a 60mm Anomalocaris appendage next to a small brachiopod. It was found in the Latham Shale in the Marble Mountains of California, and it's indicated that finding these is a very uncommon occurrence. I was wondering if anyone here might have insight as to if it's real, fake, or restored in any way. Thanks!
  4. Tidgy's Dad

    Adam's Cambrian

    A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
  5. Rcgutting

    New to cleaning fossils

    Although I have had a lifelong (40 plus yrs) fossil collecting passion I am very inexperienced and recently took a deep dive into a 4 day excursion to the Marble Mountains looking for Trilobites. I don’t have the right words yet to describe my days there… i can’t wait to return… that’s not my question … ... I have several pieces which I can see the fossil(s), however, there is a a lot of dirt, which I am afraid to brush too hard with a brush. I am looking for advice on how to clean these fossils. If photos are helpful I can post. Thank you in advance.
  6. Sjfriend

    Latham Shale unknowns

    OK, on my few trips to the Latham Shale in the Marble Mountains of Southern California I have found a few things that I'm just not sure of. I will include any info before each photo. Scale: little marks are 2mm, bigger numbered marks are cm 1: Ok, first I will include 2 photos of what I question as maybe trilobite hypostome. I haven't found any good illustrations of Olenellus hypostome. I've found probably 10 of these. They all look the same shape though many different sizes. 2: Next, I find a few of these each day. The cephalons from the trilobite species of this age tend to stay in one piece but this reminds me of the anterior lobe of a glabella. I have no other idea. It is round and inflated (about 4mm high) and will pop off the matrix. 3: This one I can't nail down at all. Is it a worm or what???? 4: This is a ? Looks kind of tooth-ish but I have no idea. I might try to get better photos when I find it again (still packed from my flights and driving) That is it. I've found at least a few of each of these except number 3. Thank you for your time and help.
  7. In October of 2021 I made a 4 day trip to the Marble Mountains of Southern California to look for trilobites. The order of note is Redlichiida. The biggest percentage is Olenellus followed by Bristolia then Mesonacis. The vast majority of finds are just cephalons followed by thorax pieces. Last year I hunted here about 8 days. I probably found over 400 cephalons (could be a way higher) but only 2 completes with 3 maybe's as there are buried. With all that I've only found 1 pygidium on its own. There are a few other fossils to be found at the site. A couple brachiopods, a hyolith, and a few other invertebrates along with trace fossils are also among the possible finds When I'm visiting family in Arizona this is my new go to spot..... mostly because it is the closest with trilobites (which of course are the best fossils out there ) It takes me about 6 hours to drive there so it makes sense to spend some time on the site. I usually end up hunting well into the night to make my time count. There are a few sights to see along the way as well, the Amboy Volcano National Monument and the ghost town of Amboy. Both are along the Historic Route 66. Scale shown in the specimen photos is: little marks are 2mm and the numbers are cm Amboy sunrise The site is near the old town of Cadiz. Here is a sign near the turnoff for the site. Once onsite you have to pick a spot and start digging. There is about 2ft of very broken and fragmented shale overburden to deal with (between the red lines) Bring a mask! This stuff kicks up a TON of dust and it's not really that healthy to breath in. This spot has been know for decades and as such the overburden from the upper digs is burying the lower sections. Would be nice if we were allowed to bring in some bigger gear to remove a lot of it to make accessing the lower areas practical. But, being on BLM land, only regular hand tools allowed. After picking my spot to play, and digging the overburden out of the way, it was time to break rock. My spot for the next 4 days So, as I stated, the vast majority of finds are lone cephalons. They range in size from a couple mm to over 10cm! Unfortunately the large ones are so hard to find intact. With the rock being so fragile / fragmented sometimes they are in dozens of tiny pieces making it about impossible to fix. So, you keep digging and splitting to find more. Mesonacis fremonti cephalon And, sometimes the preservation is weird or just awful And then you find a nice large cephalon that isn't broken (and stays that way when you try to remove it) Olenellus nevadensis cephalon (I think) One of the best large ones I've found yet. There are quite a few smaller ones to be found in decent shape. Sometimes they are really little if you keep you eyes open Olenellus clarki cephalon (I think. The smaller ones are harder to tell for me as I have not found a good reference) Sometimes you get lucky and find a multi plate with nice examples I believe this is a Olenellus double (not quite sure of species yet but it appears to be 2 different species. I really like this multi. 4 individuals all right side up. It appears to be 3 Olenellus clarki and one I haven't ID'd yet (still wrapped from travel) Double Olenellus clarki with one ventral and one dorsal (positive and negative) My only pygidium after looking at thousands of trilo - bits It appears that when they molt that the parts are barely held together. As such they tend to fall apart quickly. That is part of the theory as to why so few completes are found here. As such I did find this large thorax section. I'm hopeful that the rest is buried but it doesn't look promising (positive and negative) But after 8 total days of digging I only have a few complete. Most are partial buried. BUT, I finally found one that popped out just great! It's missing a tiny bit of cephalon but I can live with that. A little prep would uncover the hidden pleural. And maybe clean up the extra cephalon. Olenellus clarki Since this is my closest accessible spot I'll keep going back. There are a number of other species I can still try and locate complete ones, or at least nice cephalons of the different species. My dream is a large complete one. And now that you have (or I have in this case) collected your finds a word of note: since this is US government land you are allowed to collect BUT no selling or trading of specimens. You may give them away but no compensation. Speaking of this, in the future I will have some to give out once I figure what I've got and pull out my keepers. There is more to come but my computer and the internet aren't talking well at the moment so I can't download more photos. To Be continued
  8. Sjfriend

    Latham Shale Slab Repair

    Found on my last trip to the Marble Mountains Latham Shale. I found this when just a little bit was sticking out of the hillside surface. Took me most of a day to extract. As you can see, it didn't as they say "come quietly" I used a couple little tubes of super glue to hold it together as much as possible before extracting it but it still came out in more then a few pieces I spent about a week getting it back together as much as possible (I mean really, who doesn't have some bolts and screws left over when putting their car back together ) I have a lot more advanced prep to look forward to (scribe and abrasion). That will be much further down the road as I'm just getting that set up going and will be a long time before I'm going to be comfortable enough to tackle something like this. Mostly what is found are a few scattered cephalons and a rare complete trilobite once in a while. This slab happens to contain 31 cephalons (from partials, partially buried and complete) and 1 partially buried complete. Plus 1 I have no idea? When I get better photos of that I'll post for ID help. So, the photos follow the order from in-situ find to finished. I finished it as 2 large parts instead of 1 bigger piece. A little extra item in the upper right corner.... my Secret Santa gift waiting for me to open on Christmas Eve Here is the 1 partially buried complete. I think it's an upside down Olenellus clarki This was the most repair by far I've ever had to do. Now, in the distant future I'll start the harder prep to finish it off
  9. Sorry if this is the wrong topic category, I don’t have much experience with this forum. I recently found out that there are Cambrian fossils in the Marble Mountains in California, and I’m wondering what the laws are for collecting there. I’ve always wanted to collect Cambrian fossils and that’s the closest location to me, but I don’t want to break any laws. If it is legal, what tools and equipment should I bring? Thanks!
  10. We spent some this weekend with the kids poking around in the Latham shale of Cadiz, CA. The first fossil in the pic is obviously a trilobite of some kind, any specifics are appreciated. The second round one with the bump in the middle and a surrounding spongy looking matrix was found pretty close to the trilobite. Any ideas on that one it has me stumped? The last pic I believe are manganese dendrites? My question with that is are they Cambrian in age as well. Thanks everyone....
  11. While visiting family in Arizona and California I was able to figure out where the Marble Mountains trilobite quarry was located. It's not that far off the road system so I figured I'd give it a look see on my drive from central Arizona to Northern California. The location is only about 25 miles out of my way so why not. On my drive north I only had a few hours so this stop was mostly a fact finding trip. The view from the car windshield. The Marble Mountains are the lower hills to the left of center. The quarry area is just to the left of the gap between hills Ok, word of notice...... I DO NOT recommend driving a mustang here. I know my car and have driven many places I shouldn't hehehe. I had to stop about 1/4 mile from the site. Don't need a 4x4 but a little ground clearance is a big help. The road is a bit rocky but that is to be expected. It's about 1.5 miles from pavement to parking area. The site is just below the gray outcrop just to the left of the mountain gap. I arrived just before sunset and found some locals already at the site (you can just make out their truck in middle photo). They gave me some pointers on what to look for as they were leaving and I set to work. For the first hour I was mostly just wondering around seeing what I could see. There were no obvious recent diggings so I was gonna have to do some digging myself. Went back to the car, grabbed a headlight and went to search in the dark. After about 3 hours I packed up and left to continue my drive north. 5 days later I was on my way south back to Arizona. I stopped for a full day of digging this time. Kinda got the basics of the site during this stop. Then back on my way. A week later I was able to slip away for a full 3 day trip just to dig. I was able to spend some quality time on site. It is not a site that you can really hit well in a short time. to be continued......
  12. Fossilizable

    Cambrian puzzler

    While out on a trilobite hunt several years ago in the Marble Mountains, San Bernardino Cty, CA, I found these two pieces on the surface in the region of a Latham shale exposure, so I think they would have belonged to the Chambless shale, which is in fact exposed as a bluff above the surface. Here's one: Here's the other: I'm not sure about these. They might not even be organic or in the same genus if organic. The source field might be a zone with Chambless and Zabriskie quartzite mixed. So there's a chance they're inorganic, I guess. However, on the same surface/field we found a lot of fossiliferous rock that included oncolites, which are definitely known to be in the Chambless. What do you think?
  13. Paleome

    Unknown fossil/or trace

    I did not collect this. Found in a box of miscellaneous fossils at a rock show.
  14. Anyone been to the Marble Mountains in Southern California recently to search for trilobites? I know how to get to the dirt access road out of Cadiz but I was wondering about the condition of the road to the site, and also whether anyone has had much luck there in the recent past. I might head out there sometime in April if conditions are good.
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