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Found 34 results

  1. stromatolite??

    I found this a while back, and now I'm wondering if it could be a stromatolite. Though, it could just be some sedimentary formation. It was found in the red river/lake texoma in texas. Any thoughts or insight would be much appreciated, thank you! In the second photo, I sanded a bit of the side to show the layering.
  2. Paleozoic algal matting?

    While hiking through a desert area just southwest of Tucson, AZ. I found these interesting layered rocks. Over the course of an afternoon I came across a couple more spots where these types rocks were strewn over relatively large areas. Many of the pieces would fit inside a square inch or the palm of your hand, while many others were a few feet long/wide. I showed these to a local geologist and he called them stromatolithic Paleozoic limestone – evidence the area was once covered by water and these represent the layers of algae, probably in the form of algal matting that existed there, dating back to the Paleozoic time period. Respectfully, can anyone confirm or negate this idea? Thank you for your time and consideration!
  3. Sponge? Coral? None of the above?

    Found in northwestern New Mexico in an Upper Cretaceous area. Specimen was wetted with water to bring out detail.
  4. Central Missouri

    Found a few beautiful pieces in rocks dug up by the local water department.surface exposure is Gasconade dolomite so i assume these are actually late Cambrian. But im not sure how deep in the ground they came from. Either way. I love these rocks and thought I'd share them with you. A lot of the pictures are different angles of the same rock. But theres a few of a second rock. I think i found and cleaned 4 rocks. Just didnt get pictures of all of them. Hope you enjoy. Happy hunting.
  5. I have been unsuccessful in getting information about this on the general internet (the All-Knowing Google failed me, AGAIN! ). How in the world can you tell if a rock that you have in hand is a stromatolite as opposed to just a rock with striations- like agate or something? Especially if the stromatolite has had a section cut and polished?
  6. The search for extra-terrestrial fossils is looking more promising. But, I suppose one mustn’t get one’s hopes too high. NASA's Mars 2020 Will Hunt for Microscopic Fossils “Scientists with NASA's Mars 2020 rover have discovered what may be one of the best places to look for signs of ancient life in Jezero Crater, where the rover will land on Feb. 18, 2021. A paper published today in the journal Icarus identifies distinct deposits of minerals called carbonates along the inner rim of Jezero, the site of a lake more than 3.5 billion years ago. On Earth, carbonates help form structures that are hardy enough to survive in fossil form for billions of years, including seashells, coral and some stromatolites — rocks formed on this planet by ancient microbial life along ancient shorelines, where sunlight and water were plentiful. The possibility of stromatolite-like structures existing on Mars is why the concentration of carbonates tracing Jezero's shoreline like a bathtub ring makes the area a prime scientific hunting ground.” “Mars Scientists Investigate Ancient Life in Australia Could Mars ever have supported life? In the Australian Outback, scientists from NASA's upcoming Mars 2020 mission and their counterparts from the joint European-Russian ExoMars mission visited the oldest convincing evidence for life on Earth to prepare for their own searches for signs of ancient life on Mars. The field lesson in astrobiology in the Pilbara region is being applied in the near term by NASA, ESA and Roscosmos for mission planning, and will also pay dividends when both rovers begin to send back science data and imagery from the Red Planet. Credit: NASA/JPL-Caltech Also see: A field guide to finding fossils on Mars. (open access paper)
  7. Superficially, this beauty looks just like the pics of live ones from Shark's Bay, Australia. Central Pennyslvania, USA
  8. Stromatolite???

    I had the pleasure of visiting a well known collector in SW Wisconsin a few weeks ago. His home is almost as nice as any museum I have ever visited. He showed us some beautifully crystalized stromatolites that were collected in SE Minnesota. Hints were given as to where to find such specimens. So naturally, I had to find myself an example. I am just not sure if these are just geological and not biological. I hate to question a very knowledgeable man, but obviously I am. Opinions are welcomed. Mike
  9. I have recently added this piece to my collection. Was sold to me as a Sedimentary Stromatolite from Bolivia. No further info given. I have looked online and in my book and can't match it to anything. Is this a genuine Stromotolite? - it wasn't too expensive, and it's quite attractive either way. Photo of both sides. Roughly 11cm square
  10. So I seem to have developed an interest in Stromatolites recently. Can someone suggest good / reliable books, websites or pdf papers where I can do further research Thanks
  11. possibly stromatolite ?

    Hi from Greece found this few years ago. I was looking for plant fossils following some reports mentioning theese trees Pinus nigra, Buxus sempervirens, Fraxinus, Corylus,Pinus marritima, Quercus suber in petrified forms. Among findings was this is there any possibility to be some form of stromatolite ?
  12. stromatolite or stromatoporoid or what?

    The fossil I am posting today does not contain calcium. I does contain agate and my question is could it be a fossil stromatoporoid or stromatolite or something else?
  13. Middle Cambrian Stromatolites?

    Hi Everyone, I've recently returned from a weekend trip to a fossil site in central Australia. The location contains siltstone laid from the ancient ocean once in the middle of Australia during the middle Cambrian. Both John R. Laurie and Dr P.D. Kruse have completed work on the site and have some publications accessible online. Along with a good collection of trilobites I came across a number of what I believe to be stromatolite fossils. The first image (1.1) was found on the way to the location about 150km before we reached it, the road cut through a much lighter shade of rock outcropping than we had previously seen. The formation appeared identical to the Arthur Creek formation, and judging from the geological surveys I have checked it should be part of the same formation. So keep in mind the first image is not from a known fossil bed, but is only from my best judgement part of the same formation. The remaining fossils in 1.2 are all from the known fossil bed, part of the Arthur Creek formation dating to the Templetonia (middle Cambrian). Top-left looks to me like a very typical stromatolite, similar to what is still seen today in Western Australia. The other fossils seem to me to be either the same stomatolite but seen at a different stage of weathering, or another type of stromatolite. I am interested to hear the opinions of those more knowledgeable! Thanks in advance. Trip Post: The fossil site is found in the location below https://www.google.com/maps/place/21%C2%B042'53.0%22S+135%C2%B039'38.9%22E/@-21.71473,135.66081,1873m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-21.71473!4d135.66081 In the publication below, NTGS Elk 3 bore samples refer to the location visited. Stromatolite and bioturbated sea floor 1.1 Stromatolites 1.2
  14. stromatolite?

    New member here. You all have been most helpful so far, thanks. These requested possible fossil ID were collected from a drained lake bottom in western Wisconsin (Vernon County). It is not soft like sandstone. There are two different items. The longer item (#1A-D)is shown on all four sides. The shorter item(2A&B) is shown just front and back.
  15. Stromatolite? Indian Tool?

    Is this a stromatolite? Or an indian tool?
  16. I was given this Stromatolite as a gift from a family member who knows I have started to collect fossils. It came with no provenance and all the this person was told was that it is 3.5 billion years old. It looks genuine to me. Any comments? And any further info?
  17. Is this Stromatolite

    I am not sure what it is. Maybe Stromatolite? Dense piece. The coloration looks like it with the red.
  18. Miocene Stromatolite

    Here I have a sample of stromatolite which we get here in Czech republic. I am planning to go and try to find some myself but don't know much about them. Here I have a couple of probably silly questions. Are there different species? Are they always being cut? Is there any way to know if it's a good sample before it's cut? Ok, as you can see I really don't know anything about it so any info will be helpful. Sample on the photo is 14x11cm.
  19. Is this stromatolite or a fossil?

    Is this stromatolite or a fossil?
  20. Dear all, yesterday I went out for some hiking on Monte Faito (https://en.wikipedia.org/wiki/Monte_Faito), a Mesozoic mountain near Sorrento/Pompeii/Napoli, in the south of Italy. This 1400m mountain is mostly made of dolostone (https://en.wikipedia.org/wiki/Dolostone) and limestone - like Dolomites in the north of Italy. In this photo you can appreciate the rock layers of this beautiful mountain viewing the Gulf of Naples. On the path of my excursion, I found (free on the ground) and picked a brown piece of rock that caught my eye because it was different (but not the only one) from all other light gray rocks. Here you can see some photos that show the strange radial texture that cover the top side of the specimen, but also the layered side that is also very interesting and may help identifying it. First of all, is it a fossil or a mineral formation? If it is a fossil, what kind of marine fossil? While writing this topic, I found this map - http://www.isprambiente.gov.it/Media/carg/466_485_SORRENTO_TERMINI/Foglio.html - that shows all the different formations of the mountain. I collected the specimen maybe in CLU or CRQ formation. The map includes the name of all the fossils that can be found in every formation (CLU and CRQ formation's fossils are listed in the first column on the right side), I serched on Google the name of every fossil written in the map, but none of them seems to correspond to my specimen. Please, help me giving a name to this specimen Thank you!
  21. Stromatolite

    I purchased this piece last year from a miner that found this near the surface in Missouri. It's quartz on lace agate on stromatolite fossil. There is a little chalcedony in there two after examining it. I am just learning about fossils and searched this forum for stromatolites and nothing came up (that I could find) so wanted to share this with all of you. I took some photos with a macro lens of the crystals, agate and the stromatolite. I really love examining everything with a macro lens
  22. Found this in Western South Dakota, someone suggested it might be Stromatolites? Anyone know? Thanks!
  23. Hi, Here is the photos of a "Stromatolite Fossil from Morocco" that I just going to get from a seller, but after I read a post from another member, I am confused. A member named Ebo mentioned that this is not a real Stromatolite. How is the real Stromatolite Fossil looks like? I googled "Stromatolite Fossil from Morocco" and most of the photos looks similar to my photos.
  24. Stromatolite encrustation

    Side view of stromatolite piece (~10") and view of partial encrustation for ID please. Thanks, Gordon
  25. Idaho--August, 2017

    Tammy and I left South Florida yesterday and arrived in Spokane, WA after a short stopover in Las Vegas. Didn't win any money in any of the hundreds of slot machines in the Las Vegas airport but then it is significantly more difficult to win when you don't sit down and pour your hard earned money into the gaping maws of these one armed bandits. We drove from Spokane up to an area in the northern panhandle of Idaho near Lake Pend Oreille to a small town (population 530) called Clark Fork. We settled into the Clark Fork Lodge and had a surprisingly fancy meal at a quirky little place called the Squeeze Inn. I had not suspected I could get a really tasty IPA and a dish of gnocci gorgonzola in such a small rural setting but it was a truly welcome surprise after a long day of traveling. This morning we headed a few minutes out of town to a locality I found in my Rockhounding Idaho book. Someone took the time to transcribe all of the 99 sites listed there and make a Google Maps map out of it which can be found here: https://www.google.com/maps/d/viewer?mid=1yS2FsEzCIFPU2_G1Pr5SH3oN9DY&ll=45.56234707000023%2C-114.16501500000004&z=6 We were at site 8A (48.15076, -116.15902) in this book which listed fossil stromatolites in a roadcut just out of town. With the help of Tammy's iPad we easily navigated to this site and spotted the roadcut and got out to have a look. There was lots of rusty brownish rocks on the talus slope of this cut as described in the book's description of the site. We could easily see the outcrop at the top of the hill from which these broken chunks of rock were sliding down to the road level. We scanned the rocks for the distinctive rusty squiggly pattern described in the book (which said these were quite common here). Try as we may we could not find anything matching the stromatolite description in the text. We did see evidence of extremely ancient shorelines with rippled and cracked muddy sediments frozen into place hundreds of millions of years ago. I tried to load one nice looking piece into the back of our JEEP but, given the current laws of physics, I did not succeed. I tried several times to work my way up the talus slope but the rocks were just too loose to gain much of a foothold and get very far up-slope. Any attempts to climb up resulted in sliding back down on a carpet of rocks that dropped away just as quickly as I stepped upward doing a pretty good mimicry of the stairmaster endless escalator exercise machine at my gym. As I couldn't see any definite stromatolite pieces down lower in the piles I suspected I'd not find anything different higher up and didn't feel like a major injury on the first day of a 10-day trip (for once, common sense got the better of me). I did find a smaller piece of ripply shoreline that I considered lugging back in my suitcase and an interesting layered piece that was quite different from most of the other rocks but I was there for (what was supposed to be an easily obtained) sample or two of fossil stromatolite and, striking out on this locality, gave up with only photos to remember this fun but fruitless hunt.
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