Sagebrush Steve Posted July 30, 2018 Share Posted July 30, 2018 The Florissant Fossil Quarry in Florissant, Colorado, has been on my list of places to visit. It is just outside the Florissant Fossil Beds National Monument west of Colorado Springs. As much as I would have liked to go dig at the quarry, I knew that wouldn’t happen this year. So I decided to order some shale from the quarry and have it shipped to me. Even at $7.50 per pound plus shipping it was less expensive to buy the shale than to spend a week on the road getting there and back from California. After emailing Nancy Anderson at the quarry to work out the details, I mailed off my check for 20 pounds of shale and received two boxes by priority mail about a week later. I have only just started going through it but I thought I would give you this early update. The quarry is known for its plant and insect fossils, with an occasional fish or bird. These fossils come from the Eocene epoch, about 34 million years ago. The quarry’s website doesn’t go into stratigraphy but according to the National Monument website the fossils in the quarry come from the Lower Shale Unit of the Florissant Formation, which does not appear in the park itself. First thing I did was weigh the boxes and as expected, I got what I ordered plus maybe a little bit more. Here is what one of the boxes looks like when opened. Only a small portion of the shale is spread out on the blue tarp, there is much more still in the bag. Here’s the instruction sheet that came in the box. They recommend preserving it with a mix of 1 part Elmer’s glue to 2 parts water, then coating with clear Krylon. The shale is easily fractured so I definitely want to protect it, but if anyone has better recommendations, let me know. Here’s a typical piece. The thin bands of shale are separated by an occasional layer of what one reference calls tufaceous siltstone. There are no identifiable fossils in the siltstone, they are all in the thin layers of shale. I decided to throw together a fixture to help hold the shale while I was splitting it. I just took a few boards I had laying around and using clamps and screws, created a corner against which I could set the rock in place. I have a thin spring steel chisel I originally bought to split Green River fish that works pretty well for the first round of splits. Close-up of fixture. I soon realized I need to use a microscope and needle probes to really find things and clean them up. Here is my microscope setup. A lot of the shale has unidentifiable bits and pieces of organic material, but I’ve already started discovering a few interesting things. Here are a couple of partial leaf fossils. Here is another well-defined leaf that looks something like a willow. Here’s the most interesting thing I’ve found so far. It looks like some sort of winged insect. It is pretty small and I would have never discovered it without the microscope and needle probes. Close-up of head. Note the two compound eyes. I’ve only been through a couple of pounds of rock, still plenty more to go. I will keep you posted if I find anything interesting. 12 Link to comment Share on other sites More sharing options...
Ludwigia Posted July 30, 2018 Share Posted July 30, 2018 Looks like a very interesting project which should keep you busy, and hopefully happy, for a while. That little bug is already a cool find. Wonder what it is? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted July 30, 2018 Share Posted July 30, 2018 I may need to do the same. Prep builds personal equity that outright purchase of finished specimens simply cannot, at a fraction of the cost of a trip. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 30, 2018 Share Posted July 30, 2018 Looks like great fun to me! Nice finds so far! Good luck with the rest. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
RJB Posted July 30, 2018 Share Posted July 30, 2018 A bit of a drive from California so you did save some moneys. and you still get to have the fun of going through all that material. Good luck man. RB Link to comment Share on other sites More sharing options...
minnbuckeye Posted July 30, 2018 Share Posted July 30, 2018 Nice finds so far. I will be at the florissant quarry Labor Day weekend!! What instrument are you finding most helpful at splitting the shale? Razor blade? As for needing a microscope to see an insect, would there be any hint of it without the scope? Mike Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 30, 2018 Author Share Posted July 30, 2018 3 hours ago, minnbuckeye said: Nice finds so far. I will be at the florissant quarry Labor Day weekend!! What instrument are you finding most helpful at splitting the shale? Razor blade? As for needing a microscope to see an insect, would there be any hint of it without the scope? Mike The thin spring steel chisels I bought from Geo-Tools work pretty well: http://www.geo-tools.com/fossil-rock-chisels/custom-thin-rock-splitting-chisels The one I use most is 1/16” thick with the bevel on only one side. Even that one is pretty thick. I have started using a wide, flat-bladed X-acto knife to separate the thinner layers. But that blade can be dangerous if you’re not careful, so I keep my hands away and only give it light taps. If you go to the Quarry to dig they will loan you tools. And I use needle probes from Paleotools in a pin vise for doing the final prep work: https://www.paleotools.com/pin-vise-and-needles. Despite what you might think, you still need to clean up quite a bit of shale (carefully!) away from the fossil after you have split the shale. As for magnification, the photos I took through the microscope were at 6X and 12X, so a 10X hand loupe should be fine. Just take your time and don’t throw anything away without inspecting it. 1 Link to comment Share on other sites More sharing options...
Bone guy Posted July 30, 2018 Share Posted July 30, 2018 That little bug is very cool. His eyes are so well defined! Link to comment Share on other sites More sharing options...
minnbuckeye Posted July 30, 2018 Share Posted July 30, 2018 @Sagebrush Steve, Thanks for the advice. Is it similar to splitting Green River fish layer in Wyoming?? Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 30, 2018 Author Share Posted July 30, 2018 33 minutes ago, minnbuckeye said: @Sagebrush Steve, Thanks for the advice. Is it similar to splitting Green River fish layer in Wyoming?? Sort of, but the Florissant shale is more fragile and if you’re not careful you you will break it right in the middle of a fossil. Also, the fossils are more of a residue rather than anything solid. (Not a surprise since plants and insects don’t have bones!). So you have to be very careful with the prep. If you accidentally slide across the fossil with your tool it will wipe it away where the tool struck. That’s why I prefer to do the final prep under a microscope so I can be very careful about where I scrape. Of course I spent much of my career designing tiny microwave microelectronic circuits so I am very comfortable using a scope and pretty much useless without it. 2 Link to comment Share on other sites More sharing options...
minnbuckeye Posted July 30, 2018 Share Posted July 30, 2018 Being a veterinarian, I too use a scope many times a day, However, I need a different type to look at fossils. Maybe this trip will make me purchase one!! @GeschWhat has shown me from her visit what can be discovered with a scope. 1 Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 30, 2018 Author Share Posted July 30, 2018 58 minutes ago, minnbuckeye said: @GeschWhat has shown me from her visit what can be discovered with a scope. Lucky you! Does she use the same one proctologists use? 1 Link to comment Share on other sites More sharing options...
Ramo Posted July 30, 2018 Share Posted July 30, 2018 I don't think it's like green river stuff at all. It's almost more like a book with pages stuck together. I prefer to use a razor blade. I've also soaked it in water, and when it dries it's sometimes easier to split. 2 For one species to mourn the death of another is a new thing under the sun. -Aldo Leopold Link to comment Share on other sites More sharing options...
Dan 1000 Posted July 30, 2018 Share Posted July 30, 2018 Very unusual bug! Hope you find some more neat stuff! Link to comment Share on other sites More sharing options...
Xiphactinus Posted July 30, 2018 Share Posted July 30, 2018 I’ve never used anything larger than a razor blade in the Florissant shale. It slows you down and you look closer. I found a ton of tiny insects this way. 1 Link to comment Share on other sites More sharing options...
Nimravis Posted July 30, 2018 Share Posted July 30, 2018 It reminds me of the matrix from the Conasauga Formation in GA where I collect trilobites. Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 30, 2018 Author Share Posted July 30, 2018 2 hours ago, Ramo said: I don't think it's like green river stuff at all. It's almost more like a book with pages stuck together. I prefer to use a razor blade. I've also soaked it in water, and when it dries it's sometimes easier to split. I will try that. Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 31, 2018 Author Share Posted July 31, 2018 1 hour ago, Xiphactinus said: I’ve never used anything larger than a razor blade in the Florissant shale. It slows you down and you look closer. I found a ton of tiny insects this way. Agreed, I'm using the flat X-acto knife and my needle probes pretty much exclusively now. Here is my latest find, it is very tiny, only 1.5 mm long. Insect body? Seed cone? Eocene equivalent of a WWII bomb? Link to comment Share on other sites More sharing options...
GeschWhat Posted July 31, 2018 Share Posted July 31, 2018 20 hours ago, Sagebrush Steve said: The Florissant Fossil Quarry in Florissant, Colorado, has been on my list of places to visit. It is just outside the Florissant Fossil Beds National Monument west of Colorado Springs. As much as I would have liked to go dig at the quarry, I knew that wouldn’t happen this year. So I decided to order some shale from the quarry and have it shipped to me. Even at $7.50 per pound plus shipping it was less expensive to buy the shale than to spend a week on the road getting there and back from California. After emailing Nancy Anderson at the quarry to work out the details, I mailed off my check for 20 pounds of shale and received two boxes by priority mail about a week later. I have only just started going through it but I thought I would give you this early update. The quarry is known for its plant and insect fossils, with an occasional fish or bird. These fossils come from the Eocene epoch, about 34 million years ago. The quarry’s website doesn’t go into stratigraphy but according to the National Monument website the fossils in the quarry come from the Lower Shale Unit of the Florissant Formation, which does not appear in the park itself. First thing I did was weigh the boxes and as expected, I got what I ordered plus maybe a little bit more. Here is what one of the boxes looks like when opened. Only a small portion of the shale is spread out on the blue tarp, there is much more still in the bag. Here’s the instruction sheet that came in the box. They recommend preserving it with a mix of 1 part Elmer’s glue to 2 parts water, then coating with clear Krylon. The shale is easily fractured so I definitely want to protect it, but if anyone has better recommendations, let me know. Here’s a typical piece. The thin bands of shale are separated by an occasional layer of what one reference calls tufaceous siltstone. There are no identifiable fossils in the siltstone, they are all in the thin layers of shale. I decided to throw together a fixture to help hold the shale while I was splitting it. I just took a few boards I had laying around and using clamps and screws, created a corner against which I could set the rock in place. I have a thin spring steel chisel I originally bought to split Green River fish that works pretty well for the first round of splits. Close-up of fixture. I soon realized I need to use a microscope and needle probes to really find things and clean them up. Here is my microscope setup. A lot of the shale has unidentifiable bits and pieces of organic material, but I’ve already started discovering a few interesting things. Here are a couple of partial leaf fossils. Here is another well-defined leaf that looks something like a willow. Here’s the most interesting thing I’ve found so far. It looks like some sort of winged insect. It is pretty small and I would have never discovered it without the microscope and needle probes. Close-up of head. Note the two compound eyes. I’ve only been through a couple of pounds of rock, still plenty more to go. I will keep you posted if I find anything interesting. Wow...the detail on those eyes is amazing! What kind of microscope is that? It looks like a nice one. Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
GeschWhat Posted July 31, 2018 Share Posted July 31, 2018 6 hours ago, Sagebrush Steve said: Lucky you! Does she use the same one proctologists use? LOL...I now have a biological microscope as well as my scanning scope, so yes! 1 Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 31, 2018 Author Share Posted July 31, 2018 10 minutes ago, GeschWhat said: Wow...the detail on those eyes is amazing! What kind of microscope is that? It looks like a nice one. I call it my Frankenscope, pieced together from various online purchases. The scope body is a Wild M5 from the 1970s. Back then it sold new for $1500. I got it for very much less some years ago, but it didn’t have a stand or eyepieces. The stand is from an old Bausch and Lomb scope, and I machined my own adapter to make it fit. The eyepieces were some generic brand that I found out after I bought them that they don’t work with this scope. But some more time in the shop to machine down the eyepiece barrels and make some custom spacers and you would never know there was a problem. I’d love to compare it to an Amscope, which seems to be the go-to brand for this forum. 1 Link to comment Share on other sites More sharing options...
minnbuckeye Posted July 31, 2018 Share Posted July 31, 2018 Your ability to create a one of a kind microscope is impressive! 1 Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 31, 2018 Author Share Posted July 31, 2018 21 minutes ago, GeschWhat said: LOL...I now have a biological microscope as well as my scanning scope, so yes! I’ll give you a wide berth at the next fossil show. 1 Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted July 31, 2018 Author Share Posted July 31, 2018 2 minutes ago, minnbuckeye said: Your ability to create a one of a kind microscope is impressive! When you spend as much as I did for all the pieces you better make it work or you will be in trouble with your wife. 1 Link to comment Share on other sites More sharing options...
GeschWhat Posted July 31, 2018 Share Posted July 31, 2018 1 minute ago, Sagebrush Steve said: I call it my Frankenscope, pieced together from various online purchases. The scope body is a Wild M5 from the 1970s. Back then it sold new for $1500. I got it for very much less some years ago, but it didn’t have a stand or eyepieces. The stand is from an old Bausch and Lomb scope, and I machined my own adapter to make it fit. The eyepieces were some generic brand that I found out after I bought them that they don’t work with this scope. But some more time in the shop to machine down the eyepiece barrels and make some custom spacers and you would never know there was a problem. I’d love to compare it to an Amscope, which seems to be the go-to brand for this forum. Wow, sounds like a lot of work. I'm not that talented. What I like about yours is that it seems like it has the clearance to look at larger specimens. I have a Celestron 20x-40x, which I love, but have pretty much worn out the knobs used for focusing. I have to turn the top and put a heavy rock on the base in order to look at larger pieces. I think I need to see if Santa will get me an upgrade. I picked up a new (in the box) vintage Fisher Micromaster cellular scope a few months back for $50 on the Facebook Marketplace. It originally listed for $1500, so I was pretty excited to find it. I don't know how old it is, but the manual shows a 35mm camera setup for the photo tube. It is a wonderful scope, but I don't use it nearly as much as I do the scanning scope - but for that price, I don't have to use it much to get my money's worth. 1 Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
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