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Found 46 results

  1. Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA
  2. Unrecognized algae

    Hi guys, I would like to know if you can recognize this algae fossil. It is Cenomanian in age and associated with microbialites. My first guess is cyanobacteria. Thanks!
  3. 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!
  4. ID please of marine fosill

    I would highly appreciate your opinion about this formation . Marine , Pliocene or Pleistocene age, Greece . Could be algae , bryozoa ?
  5. Petrified brain coral?

    I found this in my Seattle area yard, near the dead stump of a small maple. After washing and bleaching the septums appear filled with sand and shell bits. There is also something growing throughout it like a veinous system—likely plant? It is heavy. There are striated and mineralized layers. There is a ventricle feature and a faceted stem—it’s disturbingly brain-like. I feel honored to have finally guessed my way through your captcha (respect!)~~hoping someone can identify this oddity. Best guesses so far are coral or fungus, but I’ve not found any examples sporting this stem canal...
  6. Fossil lichen?

    Saw this at a rock shop. Reminds me of lichen. Thoughts?
  7. Mystery fossil discs

    Hello again. I have several of these strange fossil discs. I cannot find tags for them in the boxes of minerals and fossils recently acquired. Possibly some sort of jellyfish? sea sponge? Any help with ID is of course always appreciated!
  8. Fossil News Summer 19 issue is available

    The Summer 2019 issue of Fossil News features the paleoart of Jimi Catanzaro, an article about late-Cretaceous pterosaurs in Cuba, more on that ammonite in amber you've been hearing so much about, an exclusive excerpt from Enrico Bonino’s new book about fossil medusozoans and how primitive algal mats helped preserve them, and a whole lot more! tinyurl.com/fnsubscribe
  9. Algae anomaly

    Hello everyone, I had recievrd this as a part of set of many fossils a few years ago as a gif, it was labeled as an algae fossil and the piece is very interesting but I am not sure what it is and what the age could be, one side is very glossy while the other is partially so, the glossy side has very interesting coloration and I am unsure of what it could be a mineral or a part of the fossil, the other side has some staining which could also be the fossil I am really not sure but another very unique thing about this is that y the side of the rock has almost a fiberous look with lines running up the specimen. The ruler provided is in inches, Thank you very much.
  10. Earliest animals developed later than assumed, Max Planck Society https://phys.org/news/2019-03-earliest-animals-assumed.html Fossil fats suggest animal life got started later than previously thought. New Atlas. Michael Irving, March 7th, 2019 https://newatlas.com/earliest-animals-evolved-later/58771/ Nettersheim, B.J., Brocks, J.J., Schwelm, A., Hope, J.M., Not, F., Lomas, M., Schmidt, C., Schiebel, R., Nowack, E.C., De Deckker, P. and Pawlowski, J., 2019. Putative sponge biomarkers in unicellular Rhizaria question an early rise of animals. Nature ecology & evolution, http://dx.doi.org/10.1038/s41559-019-0806-5 A related article: Fossil fats reveal how complex life kicked off after Snowball Earth phase. New Atlas. Michael Irving, January 31st, 2019 https://newatlas.com/fossil-fats-snowball-earth/58292/ yours, Paul H.
  11. Porocystus Globularis (2).JPG

    From the album Central Texas Fossils

    Porocystus Globularis Algael Fruit Found in Hays County
  12. florida barge canal

    a friend and I traveled to the florida barge canal on Saturday. it is a 4 hour trip for us. besides the usual finds, my friend found this, and we were wondering if it looks like algae to anyone else, besides us. lol. thanks. ( second photo is of my best finds of the day, still needing a final cleanup....also found a 4" sand dollar that broke getting it out of the bank....and a 5" thick, 6' long section of broken sand dollar edges all in hardened stone...ugh. )
  13. At this Murray County location, trilobites are not the only thing that can be found. Last April, I contacted Dr. David Schwimmer, who is a Professor of Geology at Columbus State University in Georgia. Dr. Schwimmer has also published a couple papers on the fossils from the Conasauga Formation. I wanted to see if he could identify a small piece of matrix that contained something that I have not found before, or since. I was thinking that it was some type of algae, so I sent both halves of the fossil down to him so he could examine them and see if he could come up with an ID. Here are the two halves- A couple months later, I was contacted by Dr. Schwimmer and he provided the below response. "We put your anomalous specimen in the SEM (Scanning Electron Microscope) finally, and it turns out there was no image! That means it has no relief, its a color feature, almost certainly iron oxide colors. My interpretation is that it must be some sort of relict carbon-based plant material, which would suggest, as you first assumed, some sort of algae. Since there is no tissue I would rule out red algae, which usually have carbonate crusts, leaving a green alga as the likely source". I let him keep whatever piece that he wanted and he returned the other piece. Here are close ups of the piece that I have in my collection.
  14. Pioche Shale Algae

    I was just going through a handful of Pioche Shale (Early-Middle Cambrian, Nebraska Nevada) trilo plates I bought a while ago, and found this interesting piece. I'm leaning more towards algae than worms, as they are reminiscent of the carbon film preservation of algae from Cambrian formations in China. Any thoughts?
  15. https://www.sciencedaily.com/releases/2019/01/190116111008.htm
  16. algal mat?

    Hello all. I picked up this fossil in a Permian formation on the Potash Road, unpaved section, SW of Moab. I think I can eliminate what it is not but am unsure of what it is. I do not think it is some kind of sponge. It does seem to have the structure of coral. It does not it seem to be like any bryozoan clusters I’ve seen. If that is correct, this begins to narrow it to bacterial. The fossil material is very thin overlaying a hard red clay base, so I don’t think it is a stromatolite. It does not come in layers, but seems to be just one layer. The piece is 4cm x 4cm x 4cm. The fingers in the third picture give a good sense of scale. The most distinctive feature is the tooth like ridge just to the left of the red dot in the first picture. The second picture shows the thinness of the fossil level and the other pictures show the roughness of the surface. I wonder if it might be an algae mat of some sort. I looked at posts on the forum dealing with algae mats and similar and find things loosely similar but not conclusive to my untrained eyes. If it is an algae mat, it may be a fossilized cyanobacterial piece. At this point I’d like help just putting it into the broad category of what it is, which will direct further research. More pictures available if anyone wants. If you have ideas, thanks for sharing. And if they come with some reference source, even better. Thanks. Tom
  17. Fossil algae reveal 500 million years of climate change November 28, 2018, Royal Netherlands Institute for Sea Research https://phys.org/news/2018-11-fossil-algae-reveal-million-years.html The paper is: Caitlyn R. Witkowski, Johan W. H. Weijers, Brian Blais, Stefan Schouten, and Jaap S. Sinninghe Damsté. 2018. Molecular fossils from phytoplankton reveal secular PCO2 trend over the Phanerozoic Science Advances. Vol. 4, no. 11, eaat4556 http://advances.sciencemag.org/content/4/11/eaat4556 Yours, Paul H.
  18. Kornei, K. (2018), Tiny algae may have prompted a mass extinction, Eos, 99, https://doi.org/10.1029/2018EO102539. Published on 11 July 2018. https://eos.org/articles/tiny-algae-may-have-prompted-a-mass-extinction https://eos.org/wp-content/uploads/2018/08/eos0918.pdf?x69145 https://eos.org/current-issues The paper is; Shen, J., Pearson, A., Henkes, G.A., Zhang, Y.G., Chen, K., Li, D., Wankel, S.D., Finney, S.C. and Shen, Y., 2018. Improved efficiency of the biological pump as a trigger for the Late Ordovician glaciation. Nature Geoscience, 11(7), p.510. https://www.nature.com/articles/s41561-018-0141-5 Yours, Paul H.
  19. Tung Ping Chau algae fossil?

    Today I visited an island not far from Hong Kong, it was a stunning place with beautiful Geological rock segments. It had beautiful mountains and lovely nature and some of the best variety of corals. It is also the only place in Hong Kong that has fossils. I saw this today on the beach and it looks a lot like algae fossils, I know it is uncommon to find fossils there but is this really a algae fossil? Sorry for if the photos were not good enough.
  20. Chlorophyte or Chloud Faces?

    Hello, all. After my last wonderfully successful Id effort on here, i thought I'd try again. This specimen was boshed free of some matrix that was sent to me by the unrivalled Ralph @Nimravisin a batch of matrix from the Conasauga Formation, Upper Cambrian, Georgia, USA and home to a multitude of the trilobite Aphelaspis brachyphasis as well as rarer agnostids and other even rarer trilos. I was looking at this paper https://www.researchgate.net/publication/250083071_Exceptional_fossil_preservation_in_the_Conasauga_Formation_Cambrian_Northwestern_Georgia_USA and thought my specimen below looks rather like the example D in Figure 3 (sorry, I don't know how to just post that image. It's a chlorophyte, so is mine ? They appear to be sort of tiny strings of sausages, the longest string being about 2 mm long, so each individual 'cell' is very tiny indeed. Thank you for any comments, ideas or suggestions. Adam.
  21. I have a Tridenticeras peramplum ammonite steinkern from the Austin Chalk that has part of it incrusted with algae/moss from sitting in a small creek where I found it. What would be recommended to clean moss off of chalk fossils, not just ammonites? What ever the method that is recommended I would first try it out on a fossil-less chunk of chalk to make sure that the process wouldn’t be detrimental to the matrix. I also don’t want to scratch the fossil by scrubbing it with something overly abrasive since the matrix weakens when wet. I usually use a soft bristled toothbrush for cleaning dirt off of specimens. Would that enough? Thanks in advance!
  22. World’s oldest algae fossils date back 1 billion years, says new research, Intelligencer, December 24, 2017 https://www.mcgill.ca/channels/channels/news/origins-photosynthesis-plants-dated-125-billion-years-ago-283492 https://www.lintelligencer.com/worlds-oldest-algae-fossils-date-back-1-billion-years-says-new-research-419-2017/ First photosynthesis took place 1.25 billion years ago: Study Economic times, Dec 24, 2017 https://economictimes.indiatimes.com/news/science/first-photosynthesis-took-place-1-25-billion-years-ago-study/articleshow/62231708.cms The paper is; Gibson, T.M., Shih, P.M., Cumming, V.M., Fischer, W.W., Crockford, P.W., Hodgskiss, M.S., Wörndle, S., Creaser, R.A., Rainbird, R.H., Skulski, T.M. and Halverson, G.P., 2017. Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis. Geology. https://pubs.geoscienceworld.org/gsa/geology/article-abstract/524864/Precise-age-of-Bangiomorpha-pubescens-dates-the Yours, Paul H.
  23. Hello, I want to put together some pics of some of the reef material that I have found in Streetsville, Mississauga, Ontario on the banks of the Credit River. It is now winter and I am missing the warm days in which I can go and wade in the warm waters of the river for fun. I just want to compile and share some specimens that whose photos I have not shared with. All the fossils belong to the Georgian Bay formation, Upper Member, which is late Ordovician in age. First is the common coral that displays an enormity of growth forms, Favistella alveolata (Goldfuss, 1826).
  24. ALGAE ?

    This was sent to me in a sort of starter pack of fossils from the United States about 40 years ago. It doesn't look like any algae or stromatolites I have seen from this site. Any ideas anyone? More pics to follow.
  25. Beach rock

    Hi guys i have this rock in my collection. I don't remember where or when i pick it up. Any idea of what it is? Kay
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