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Found 8 results

  1. Arizona Miocene Meanders

    Miocene lakebed deposits north of Phoenix have revealed more than palm and unknown reed like plants. I found stromatolites preserved in black, gray and white chalcedony. Although not as common as in the Precambrian, stromatolites still occur in oceans and in lakes. See article about the ones in Utah’s Great Salt Lake: https://geology.utah.gov/map-pub/survey-notes/glad-you-asked/is-there-coral-in-the-great-salt-lake/ My favorite one is this 10 cm high detail of a much larger stromatolite. #1 This 38 cm one came home with me. #2 Here is a detail of #2. 9 x 13 cm. #3 Here is a 6 cm high relatively flat stromatolite. #4 Detail of side of #4. Scattered pieces of palm occur. 9.5 cm high. #6 This silicified palm has calcite crystals growing in it. 13.5 cm long. #7 Detail of #7. It looks like an art piece.
  2. Turning Lemons into Limes

    Here are some more Miocene plant fossils from lake sediments north of Phoenix, Arizona. The first large piece of brownish chert, a lemon, had poorly preserved stems. Because the lake sediments had abundant uranium, the rock glowed bright lime green under short wave UV light. Organic matter often attracts uranium deposition.The second piece in the third photo has a great impression of plants that looks like it could have been created in fresh concrete yesterday. Field of view in all photos 6-9cm long.
  3. the paleolimnology of a Holocene lake

    here THE SUBFOSSIL ALGAL FLORA OF THE LAKE BOLLING SØ AND ITS LIMNOLOGICAL INTERPRETATION BY E. FJERDINGSTAD København 1954 Det Kongelige Danske Videnskabernes Selskab Biologisk Skrifter,Bind 7,n.6/1954 large!!!!: 37 MB I need/would appreciate help in tagging AT LEAST PeatBurns! ampersand etc.. For anyone focusing on The Bolling* interstadial,this might(should?) be interesting *diacritic omitted
  4. Actinocrinites? Mineral?

    Hi! I always post specimens that may be just minerals... which are the real difficult ones for me to identify. I would like to ask you what do you think about this one. It was found near the other two specimens I posted before, one of them seem to be a baryte nodule and the other one we still do not know for sure. It was found in Santorcaz, NE Madrid province, Spain, in a site where miocene fossils have been found, and where we can still find many limestones which originated in an old lake. I think this may be... only may be... part of an actinocrinites called "calyx" (?). Thank you all!
  5. Hello! Is it an echinoid?

    Hi! This is another specimen I found next to the others I just posted. While the others are red and look like coral, this one looked to me as a skull at first glance. I collected it and I found out it had an intertesting soft texture over the hard stone when I started to clean it. I can say it is a bit like skin... so I stopped the cleaning process because it came off. It seems to be broken. Maybe an echinoid? The problem is always that the fossil may be really inside the matrix... Thanks!
  6. Hello! What is it?

    Hi, I would like to ask you if you happen to know what these fossils are. They were found in central Spain, on a farm field that I have learned to be a not well-known Miocen limestone lacustrine site. It remineded me of petrified wood when I first saw it and then I thought it could be coral. However, if you look carefully you can see that it was possibly part of a rould-like creature as I could find several pieces that actually fit. As you can see, the creature was not all the same as part of the surface where the pieces seem to assemble look totally different. The surface is not perfectly round. Please let me know if you happen to know what it is. Thank you!
  7. what is this fossil

    found in miocene rocks, lacustrine environment.
  8. newark basin analysis

    excellent analysis of basin fill geometry(read it coupla months back,BTW,but in this case I trust my memory) schlisolsen_90_sm.pdf do not open if allergic to rigorous quantitative analysis
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