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  1. fossil35

    Florissant Fossils Help

    I found a few in the last bit that I wasn't sure what they maybe. Wanted see if anyone know what they where or if any are good enough to keep. #1 (wasn't sure thinking plant or moss) #2 (seed???) #2 (different angle/closer) #3 (first half) #3 (first half closer) #3 (second half) #4 #4 (closer)
  2. fossil35

    Is it a fossil

    Had a question of if anyone would know if piece below is a fossil or not? If is fossil, maybe what kind would be. A split had a rounded bump look and left an imprint on the other half (imprint half was hard to focus well with the different level of high). Its from Florissant. Wanted make sure so don't throw anything out that could be good but was hard tell if was even a fossil or not. #1 #1(from side) #2 (other half) #2 (second half different view)
  3. connorp

    Florissant Beetle to ID

    Curious if anyone recognizes this beetle (?) from the Florissant Formation (Eocene; Teller County, Colorado). I had a look through "The Fossils of Florissant" (Meyer 2003) but did not see an obvious match.
  4. Being a Colorado native, I have taken multiple trips to the public-access Florissant Fossil Quarry located near Florissant Fossil Beds National Monument in Florissant, Teller County, Colorado. This quarry provides fossil collectors fantastic access to the shale layers of the Florissant Formation, a late Eocene (Priabonian, ~34 million years old give or take) lagerstatte known for its diverse fauna of fossil insects, in addition to plants, gastropods, and very rarely vertebrates. Most fossils occur in very thinly laminated ashy grey shales. Other lithologies present include well-sorted tan course sandstones and well-sorted grey claystones. A lacustrine depositional environment is apparent, and though the Florissant Formation has previously been interpreted as the remains of a single large lake (the retroactively named Lake Florissant), it is now generally thought that deposition occurred across several smaller lakes, which of course shifted in their exact location throughout the period of deposition. This thread is for me to share some of my better quality (or more interesting) fossil insect finds from the Florissant Fossil Quarry, and to allow other people to share their Florissant insects. I intend on updating this thread as I make more collecting trips. Most insect fossils found at Florissant are of poor quality, however exceptionally beautiful specimens do crop up quite frequently. Regardless, identification even down to family level is usually very difficult, and some specimens I even have difficulty assigning to an order. Additional reading: https://bioone.org/journals/palaios/volume-27/issue-7/palo.2011.p11-084r/DEPOSITIONAL-SETTING-AND-FOSSIL-INSECT-PRESERVATION--A-STUDY-OF/10.2110/palo.2011.p11-084r.short Please note that at least for now picture quality is not ideal. I do not have the capacity to take good quality macro photographs, but I am doing the best that I can. The scale of the ruler is millimeters, magnification (when applicable) is noted. Order Diptera (True flies): Probably my best-preserved Florissant insect (and one of the first ones I ever found). Another fly. I'd like to be able to identify this one to family (and it almost certainly is identifiable to family) but I haven't been able to place it. This is a gorgeous fossil! Magnified 20X under a stereo microscope. Another gorgeous fossil fly. Possibly a gnat (suborder Nematocera), but I'm not 100% on this identification. Partial fly of indeterminate family, most of the abdomen is apparently missing. Both wings are preserved, the thorax and head are also nicely detailed. This is an example of a march fly (Family Bibionidae), probably the most common insect at Florissant. Many specimens (such as this one) are preserved without their wings. The head and mouthparts are very nicely preserved here, I feel shameful that I could not manage a better photograph. Crane fly, (Family Tipulidae). The preservation quality is not fantastic, but the gross anatomy can be easily made out (both wings, the abdomen, thorax, head, eyes, and even the halteres and some of the legs are present). Order Hymenoptera (Bees, ants, wasps, and relatives): A nice solitary bee (clade Anthophila). The details are not as high-fidelty as some other Florissant insects, but a nice complete specimen. Order Hemiptera (True bugs): Magnified 20X under a stereo microscope. A shield bug (superfamily Pentatamoidea). This is a really neat specimen because fossil Hemipterans aren't particularly common. Indeterminate Order: A large insect that I've never quite been able to place. Two wings are very faintly preserved which would normally be indicitave of a fly, but this specimen just doesn't look much like a fly otherwise. The antennae are interesting, it's a very large insect, and the tibia has an interesting flange. Unfortunately I can't seem to get a good look at the mouthparts (which has been very useful for me in the past for identification). Magnified 20X under a stereo microscope. At first I thought this might be an ant (family Formicidae) but under magnification the shape of the head is more suggestive of a fly. Very poor preservation, I'm not confident I'll ever get a solid answer here. Larvae: A nice plump fly larva, looks to me to be from a botfly (family Oestridae) or a relative. A very strange fossil. The segmentation and tagmosis definitely means this is an arthropod of some sort, and an insect larva is my current interpretation. Still, I've never seen anything quite like it. I've had a few people suggest to me this might be the abdomen of an earwig, but that's definitely not the case (earwig cerci do not look like this or articulate with the abdomen in this manner). Non-Insect Invertebrates: Just an example of one of the tiny gastropods that are common. It takes a keen eye to see them, but once you can recognize them you realize they're very plentiful. If you have some fossil insects from this locality in your collection, feel free to post them here too! Cheers!
  5. About a year ago I made a post where I made a post on the forum where I shared some of my more interesting fossil insects I had found at the Florissant Fossil Beds in Colorado. For those uninitiated, the Florissant Formation is an Eocene (Priabonian Stage, ~34 Ma) lägerstatte notable for exceptional preservation of plant and arthropod fossils. My original post can be found here: One of the fossils I showed off in that post was of an insect larva which I had interpreted as a fly (order Diptera) larva, speculating that it may be a botfly larva because it possessed setae which resembled those of a botfly. I had never been super confident in this interpretation, and over the last year I’ve showed the fossil to several knowledgeable friends, paleontologists, and entomologists. What has emerged is a different consensus that I am much more confident with (and is far more intriguing than what I had originally thought!): this fossil is in fact the dorsal view of a caddisfly larva (order Trichoptera). There are several anatomical characteristics present which I had failed to notice initially. To start, I was viewing the fossil backwards. I had interpreted that anterior end as the posterior end and vice versa. Once I had this corrected, it became clear that the insect’s head and thorax are both clearly definable and both eyes are visible on the head. Additionally, small portions of the legs are visible sticking out from the thorax as well. I originally did not see any legs which had informed my original interpretation, but in this fossil most of the legs are tucked underneath the body and not visible. Here’s the fossil. The anterior end faces to the left. Here’s a picture of a modern caddisfly larva sans its protective casing. It is oriented in the same fashion as the fossil, for comparison: Caddisflies are closely related to butterflies and moths (order Lepidoptera) but they have larvae which live in bodies of water. Many caddisfly species’ larvae build little casings out of silk and pebbles/debris to protect themselves, but this is not universal. The larva seen here is not within a casing, so it either died in a rare instance in which it was not in its case or it is of a species which does not build cases. Adult caddisflies have been reported from Florissant, as have fossils of isolated larval casings, but I was unable to find a description of a body fossil of a caddisfly larva. Not to say one doesn’t exist, they just seem to be obscure. So there you have it: a really interesting and unique find from this fossil locality. Just needed another half dozen or so sets of eyes to figure out what was actually going on there!
  6. Good evening to my fellow fossil lovers! This report has been on hold for a while, hovering near the top of my paleo-to do list. But to be honest, I haven't been on the forum as much these last few months and I've just sort of kicked the can down the road, pushing it off. Well here we are in August 2022 and I'm a whole year and some change removed from this excursion, but I say better late than never. With that out of the way lets jump into this adventure! I hope you're ready for... The Roadtrip Through Time: Colorado Part I: Pierre Shale In the winter of 2021 I had the beginning of an idea... Something a bit ambitious, but within the realm of possibility. I wanted to organize a road trip which would bookend my already scheduled excursion with PaleoProspectors to hunt for dinosaurs in Montana during the last week of July. I present this idea to Quincy @Opabinia Blues, a friend I had made on my trip to Wyoming in the summer of 2020 and a native of Colorado, who would also be hunting the same week in the Hell Creek. My idea was to fly into Denver to meet with him, visit several spots throughout the state and eventually make our way north into Montana. Joining me on the trip from New Hampshire would be my best friend of over a decade, Michael @Mickeyb06. With a week of hunting the Lance under his belt from the year before, I knew his eye would be better, resulting in him finding more this time around. Several months of creating routes, researching accessible sites and forming itineraries led us all the way to mid July, when Michael and I would fly out of Boston Logan to Denver. By the time we had landed and met Quincy it was already mid afternoon. Quincy presented us with two options, head home for the evening or push on to one of the fossil sites. Ready to explore, I chose the latter. We decided to stick to our plans and head west into the mountains. The first site on our tour would be in Kremmling to hunt exposures of the late Cretaceous Pierre Shale. While I could have chosen this area or the Baculite Mesa, I decided I would prefer the mountainous scenery. Of particular note was the Kremmling Cretaceous Ammonite Locality, a protected zone where collecting was prohibited. Within this zone were dozens of calcareous sandstone concretions, many of which preserved the impressions of the giant ammonite Placenticeras and other marine invertebrates. This environment is interpreted as storm deposits of near-coastal sand bars, with the accumulation of ammonites coming as a result of their mating rituals, subsequent mass death and eventual deposition (similar to what was featured in Episode 1 of Prehistoric Planet!). After rain, water collects within these great molds, creating natural bird baths, a colloquial nickname for ammonites of this caliber. A view of the adjacent ridgeline and the mountains which surrounded us. Note the hazy sky due to wildfires elsewhere in the state. Candid shot of Michael. The winding trails. An assortment of smaller invertebrate fossils we found in the first few minutes, clusters of inoceramid bivalves and partial ammonites. Information plaque which included a beautiful illustration by Ray Troll. The first birdbath ammonite we found, with a large section of Baculite included. Another birdbath, GoPro for scale. After checking out the site for a while, we ventured outside of the protected zone onto surrounding BLM land to hunt our own non-vertebrate fossils. A beautiful piece of petrified wood. A partial cast of an inoceramid bivalve. One of my only pieces of ammonite that afternoon, a small segment of baculite. My last find of the day, a big chunk of Cretaceous sea bed, covered by the shell impressions of its long dead inhabitants (small inoceramids and a baculite). A beautiful sunset through a hazing Rocky Mountain sky. Stay tuned for more, because there is plenty to come!
  7. In the summer of 2020 jpc and I had planned to get together in Eastern Wyoming to collect. That trip was unfortunately aborted by the coronavirus outbreak that year. This year, that conversation resumed and a new plan for a three day excursion in June emerged. I decided to make it a two week long car trip, driving all the way from New York, a longer car trip than any I've made in the past 25 years. That would afford me the opportunity to stop at some other sites on the way there and back, plus see some family. Another big reason for driving was an opportunity to visit and collect at the Big Cedar Ridge Cretaceous plant site. Having the car would afford me the opportunity to bring the necessary tools and be able to transport the fragile specimens safely. The rising price of gasoline certainly had an impact, and my plan was to cut costs as much as possible wherever I could. Part of that plan was camping 10 nights I departed the suburbs of New York City on Saturday, June 11th. That evening I arrived at Sturgis, MI, just off interstate 80. Spent the night in a motel and headed off the next day, driving through the heart of Chicago enshrouded in mist. It was my very first time driving through that city. I headed north and in the middle of the day arrived at my cousin's place in Madison, WI. He had moved there from Manhattan five years ago to teach music at the University of Wisconsin. This was my first time visiting him there, my first time in Wisconsin, actually. He took me on a lovely tour of the school and the town. I spent the night and was on my way again just before noon the next day. It rained off and on as I drove through Western Wisconsin and crossed the Mississippi into Dubuque, Iowa. From there it was a short drive to my first fossil stop- at Graf. This Upper Ordovician site in Maquoketa Formation is famous for its nautiloid death assemblage. I have found quite a few nautiloids over the course of my collecting career, but I've never encountered a site where they are thoroughly dominant. There was a layer of limestone, a few feet thick that was in many places just packed with their shells.
  8. Fossil finder 100

    Plant ID

    While on vacation with my family we stopped by the Florissant Fossil Quarry in Cripple Creek, Colorado. Out of all the little leafs and branches we got this was probably the best one. I was wondering if it was possible to identify what kind of plant this leaf belongs to and what would be the best way to preserve it. Thanks ahead of time!
  9. My first fossil hunt post. Yesterday (May 29 2022), I went down to the Florissant Fossil Quarry in Florissant Colorado. Its about a 45 minute drive west of Colorado Springs. Its a very well know site partly because of the very well preserved fossils and relative abundance but also because of how easy it is. You pay a small fee and they give you the tools and you pick up shale and start splitting, that simple. You're guaranteed to find something if you try. If you are in the area I would definitely recommend stopping by, its just not really on the way to any popular stops. There is also the Florissant national monument, separate from the quarry, where you can see the massive petrified tree stumps and learn about the fossils in the formation. Attached is an image to show you, I did not take this picture since I didn't go to the monument this time. I had gone prior and really liked seeing this giant fossils. It appears as if it is frowning. The "eyes" are sawblades that got stuck when people tried chopping it down over 100 years ago. You can't use a saw to cut a petrified tree this large though. There used to be many more but they were sold to people all over the world many years ago. Walt Disney even bought one for Disneyland. It was a very nice day at 65 F (18 C). This is what the exposure looks like. You are not allowed to collect from the exposure itself, hence the rope blocking it off. You have to settle for the piles of shale shown in front, which still contain many fossils inside the paper thin shale. The most common fossil besides unidentifiable plant material are leaves. Here are the ones I kept. I believe the next three are of the genus Fagopsis, one of the more common ones. They are 5.7, 3, and 3 centimeters respectively. I measured down the stem, I'm not sure how to properly measure a leaf fossil. Do you measure the stem, the slant height, the circumference? No idea. The next one is the largest one I found, a 7.7cm Willow leaf, family Salicaceae. I am terrible at leaf identification, and all the fossils I found this trip really. I looked through The Fossils Of Florissant book by Herbert Meyer, but still am not certain on many of my finds, so if anyone can identify them I'd appreciate it. From the largest leaf to the smallest, this one is only 7mm long, it split cleanly so I have both sides of it. However some material stuck to both sides. Here's some more leaves for you. 2.3cm Koelreuteria allenii, also 2.3cm 3.7cm for the longer one. 5cm Two and a half centimeters. Three centimeters. The next two seem like they would be easy to identify but I couldn't find a similar picture in Meyer's book. The first one is 2.4cm long and the second, 1.5. The detail that is persevered is incredible. It looks just as detailed as a leaf I could find in my front yard. Here's a close up of the leaf above. The "circle" has a 10mm diameter. This one is a winged maple seed, likely Acer macginitiei and is 11mm long. A knot on some wood, only 5 mm long. Here are the insects. Only 1.5mm long. The wings are barely visible. This one looks like a fly, order Diptera. I have both sides, unfortunately the other one isn't very good. Its half a centimeter long. This one is also a fly I'm guessing. Its 4mm long. An odd one, 5mm long. An unknown larva. Its 0.4mm long. Florissant is one of the rare places where eyes can be preserved. And last but not least are the four gastropods I found. They are very tiny but very interesting. The first one is only 3mm wide. It was split open so I have the positive and negative. This one is only 2.5mm wide, possibly the best preserved out of the four though. The "large" one, 4mm long. This one is also about 4mm long. The first and fourth gastropods are a yellow color whereas the other two are a pearly white. That's everything, I hope you enjoyed it. Again, thanks if anyone could ID anything, and thanks for reading this far and looking at the photos. I truly appreciate it.
  10. A rather strange insect from the Florissant Formation of Colorado, looks like a larva or some sort of soft bodied insect. The first piece, in better condition: And the second piece: I can definitely see segments and it seems to be a close match to this Tipula hepialina (crane fly) pupa from the iDigPaleo system: Do you guys think it fits? Thanks in advance!
  11. gutenfrog

    An Odd Florissant Find

    Hi, I last visited this site a while back, after I received some fossil shale from the Florissant Quarry a couple years back. You all were wonderfully kind in responding. Well, I've upgraded my home lab (I've been hunting tardigrades for the last year or so), and I have a solid stereoscope, and I decided to revisit my shale to look for microfossils or things that I'd missed. I came across this section (perhaps half an inch in total); the view is a shot through my stereoscope. To my eye, it's plant material, and it looks like wood cells. From what I understand from Herb Meyer's The Fossils of Florissant (SO GREAT), wood fossils (aside from the huge stumps, of course) are relatively rare. If so, and it might be of interest to folks, I'd be happy to send it along to the Florissant folks. Anyway, thanks for reading, and take care. Brett
  12. Hi Everyone. I was fortunate to be able to take a weeklong vacation trip the week of Labor Day, my fourth since I began collecting fossils. I wanted to visit friends and family and do some collecting. I was able to do all of that. It was busy, but there was also some quality relaxation time. It proved to be a good break. I flew into the Denver airport, rented a car and drove to Colorado Springs where I was invited to stay with my second cousin and her family. Next morning I was on my way to Florissant Fossil Quarry. I've known about Florissant for over 50 years and over 40 years ago I visited the National Monument, back when I was interested in fossils, but not into collecting them. This time I was intent on collecting and spent four hours splitting shale at the pay to collect quarry. The famous Florissant site was a lake during the late Eocene age. A number of eruptions from a nearby volcano buried animals and plants in beds of shale that were in turn covered by volcanic ash which beautifully preserved their exquisite details. These photographs show the exposure that's quarried, the area where guests like me can split the shale, and my finds from four hours of splitting.
  13. Top Trilo

    Fossilized Florissant Feathers?

    Just as it says in the title, are these feathers from the Eocene Florissant Formation of Colorado. Or are they plant parts. They both are about 9mm long, 1/3 of an inch. Thanks for your help.
  14. Hello, I got this fossil dig kit at a rock and fossil store and I was wondering if there is anything I should know about collecting fossils from this formations shale before I open it up and use it? I was also wondering if anyone knows where kits like this are from so I can keep track. Images are of both sides.
  15. Earendil

    Interesting Florissant Fossil

    Hello, Another Unidentified Florissant Object, some sort of attachment on a monocot/reed/stick. Maybe the attachment is an insect egg, or a larva, or just a seed of some kind. You can definitely see they are connected. Maybe you guys can help figure this one out, if it's unidentifiable I totally understand. @piranha @Top Trilo @Rockwood @Tetradium @LabRatKing, y'all have helped me in previous topics. Thanks!
  16. Earendil

    Florissant leaves

    Hello everyone, sorry to be posting so much Florissant fossil quarry material, but I'm going through my collection of foliage and still need these ID'd. Most of these leaves are obviously pretty common, but I can't find some of them in the book Fossils of Florissant. So here they are: 1. Think it's a Fagopsis, but just double checking. 2. Don't really know, feeding traces around the edges.
  17. Earendil

    Heteropteran Insect

    From the album: Florissant Insects

    Dorsal and Ventral sides of an unidentified Heteropteran insect. Poecilocapsis perhaps? Notice the long legs!
  18. Earendil

    Heteropteran Insect Dorsal

    From the album: Florissant Insects

    The Dorsal side of an unidentified Heteropteran insect. Poecilocapsis perhaps?
  19. Earendil

    Cardiophorus Florissantensis

    From the album: Florissant Insects

    Cardiophorus florissantensis (Click Beetle) dorsal side
  20. Earendil

    Cardiophorus Florissantensis

    From the album: Florissant Insects

    Cardiophorus florissantensis (Click Beetle) ventral side.
  21. Earendil

    Heteropteran Insect ventral

    From the album: Florissant Insects

    The Ventral Side of an Unidentified Heteropteran Insect. Poecilocapsis, perhaps?
  22. Earendil

    Cardiophorus Florissantensis

    From the album: Florissant Insects

    Cardiophorus Florissantensis (Click beetle) Dorsal and Ventral sides
  23. Hello everyone, This fossil really has really puzzled me, when I first found it, I assumed it was just a stick. (A cool stick, nonetheless.) On closer examination, however, it appears to have a 'vein' running through each of the three prongs and none of the typical woody texture you see on most wood specimens. Could it be a leaf?? Can someone help me figure this out? Thanks! The longest projection measures 2.5 inches. @piranha @Top Trilo @Rockwood
  24. I've always wanted to visit the Florissant Fossil Quarry due to my interest in paleoentomology but for one reason or other, I was never able to make it out there. I was finally able to make a detour out during a roadtrip returning from a funeral last week. There were beautiful calm skies, which was lucky too since heavy rains were forecasted for the next 2 days. After a good 5 hours, this is what I had to show for my efforts: Most pieces will have unidentifiable organic smudges. Aside from that, small leaves are the most common readily recognizable fossils. I am a terrible botanist, if anyone has any IDs, that would be awesome.
  25. Earendil

    Florissant unknown (fish scale?)

    Hello everybody! I have another U.F.O here (Unidentified Florissant Object) and to be honest, this one has really stumped me! It isn't a carbon stain, it isn't one of those pumice chunks 'fireballs' that are common at Florissant, and it has a strange texture and shape. Weirdly preserved petrified wood? That is my best guess as of now... @piranha @Top Trilo @Tetradium The fossil is 1/2 an inch long. The first 2 pictures are the fossil by itself and the third I circled it. The rest are microscope pics of the texture. Pics 5,6, and 9 show the edges. 7 shows the top.
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