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Found 39 results

  1. Strelley Pool Stromatolite

    From the album Miscellaneous

    A section of a stromatolite from the Strelley Pool Chert, Western Australia. Currently, these stromatolites are among, if not the oldest known fossils. There is possibly earlier evidence of life in the form of biogenic carbon, but this chert produces the oldest known mineralized preservation of organisms. Of course everyone wants to find the "earliest life," and it becomes difficult to differentiate between microorganisms and geologic structures in rocks so old, so there will always be disagreement and competition. Likely, there are older fossils already found or yet to be, but it requires a large amount of evidence and arguing to form some consensus. From what I've seen, this appears to be the most widely accepted "oldest fossil." Perhaps as (or more) interesting is what we can apply from the debate to searching for evidence of life on other worlds ... More info: "Strelley Pool Chert and Early Life" [NASA] "A Rare Glimpse of Paleoarchean Life: Geobiology of an Exceptionally Preserved Microbial Mat Facies from the 3.4 Ga Strelley Pool Formation, Western Australia" [NCBI] "World's Oldest Fossils Found in Ancient Australian Beach" [Science Magazine] "Stromatolite reef from the Early Archaean era of Australia" [Nature] "Controls on development and diversity of Early Archean stromatolites" [PNAS]
  2. Fossil Wood in Southeastern PA?

    Hello again Fossil Forum, Last week I posted a few pictures of what I thought might be fossil wood that I found on my property in Southeastern PA (Montgomery County, just over the Philadelphia County line). It seemed that it was possible that my rocks were fossils, but also maybe not... One helpful user suggested that I might polish some of the ends (hopefully crossections) of a few pieces. So below and in the next few replies I will post some pictures of a few pieces, for the polished parts I used a cabbing machine. I live at the bottom of a relatively steep hill and these pieces were all found within about 50ft of each other. If there seems to be some variety, that is in keeping with what I found after consulting several geological maps of my area: my property appears to lie at the precise intersection of precambrian, lower paleozoic, and cambrian regions and includes both sedimentary and metamorphic rocks. If not fossil wood, possibly stromatolites? ...or just more interesting rocks?? For discussion purposes I'll number the pieces and put them in separate replies. Thank you again for any thoughts, information, and opinions!
  3. I am heading to Herkimer for a trip soon, and I was wondering if anyone knew any places one could find fossils? I heard some of the mines have stromatolites but I could not find much information on that. I also hear about trilobites near the diamond mines, and I hope to find some, and if anyone has any advice that would be appreciated.
  4. Hi everyone Surface find in SW Arizona that I would like to ID if possible. I believe this is Stromatolite and it appeared to have a shark, Ray or Skate egg sack on it so I brushed some synthetic oil on it and put it under the microscope. looks like something inside there to me. My first thought is Xenacanthus although whatever that is in there doesn't really match up that well. Complete newbie here asking is this Stromatolite ? and what is that in the egg sack ?. Finding Graptolites, Arthropod's and Stromatolite in the same areas.
  5. Stromatolite? Found in Silurian reef. Thanks for any help..
  6. 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.
  7. 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!
  8. 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.
  9. 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.
  10. 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?
  11. 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)
  12. Superficially, this beauty looks just like the pics of live ones from Shark's Bay, Australia. Central Pennyslvania, USA
  13. 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
  14. 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
  15. 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
  16. 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 ?
  17. 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?
  18. 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
  19. 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.
  20. Stromatolite? Indian Tool?

    Is this a stromatolite? Or an indian tool?
  21. 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?
  22. Is this Stromatolite

    I am not sure what it is. Maybe Stromatolite? Dense piece. The coloration looks like it with the red.
  23. 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.
  24. Is this stromatolite or a fossil?

    Is this stromatolite or a fossil?
  25. 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!
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