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Pre–Younger Dryas megafaunal extirpation in southern California
Oxytropidoceras posted a topic in Fossil News
How Early Humans May Have Transformed L.A.’s Landscape Forever Science Friday, NPR, August 25, 2023 Uncovering Death by Fire 13,000 years ago Micheal Price, Sciences News, August 17, 2023 La Brea Tar Pits Reveal Clues to Mysterious Mass Extinction By Shana Hutchins, Futurity, August 18, 2023 The paywalled paper is: O’Keefe, F.R., Dunn, R.E., Weitzel, E.M., Waters, M.R., Martinez, L.N., Binder, W.J., Southon, J.R., Cohen, J.E., Meachen, J.A., DeSantis, L.R. and Kirby, M.E., 2023. Pre–Younger Dryas megafaunal extirpation at Rancho La Brea linked to fire-driven state shift. Science, 381(6659), p.eabo3594. Yours, Paul H.-
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Here are the only fossils that I have at the moment I hope to continue to grow my collection! Pictures 1, 2, and 3 are of my Mantellisaurus atherfieldensis vertebra. Per the seller, it is from the Cretaceous (Barremian Stage), and originated from the Isle of Wight's Wessex Formation (Wealden Group). Picture 4 is of my flea market Colpocoryphe grandis, likely originating from Morocco. Picture 5 is of my gifted partial (most likely) Merycoidodon gracilis skull, originating from possibly Wyoming or Nebraska. Picture 6, my most recent purchase, is of a plate of four upper Cretaceous shrimp originating from Hjoula, Lebanon's Sannine Formation.
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Hello all! This is my first post, so forgive me. I found this near a small stream in a hiking spot called LimeKiln in Porter Ranch, California, Los Angeles County. I know nothing about the area, and while I’ve heard that LimeKiln used to be a lime quarry I don’t even know what lime looks like so I’d rather not guess as to what sorts of rocks are nearby. Anyway, is this an actual fossil? It feels heavy like a rock, not light like bone. If so, any ideas as to what it might be? Please forgive my hand holding video with no measurements. I will dig up a ruler tomorrow, but for tonight I’m just so excited about this I’m posting anyway, just in case what I have found is super obvious. Forgive me, I’ll do better next time! I really appreciate you looking at this thing I’ve found. It’s been on my list to find a fossil for a very long time. Hopefully this is it! IMG_1382.MOV
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Found this about 10’-12’ deep while digging a soil sample in Rancho Palos Verdes, CA. I’m located on the peninsula, 575 feet above sea level. Object weighs 2.5 lbs and is pretty solid. Noticed a very small shell imprint. Ignore dark colors, it was damp from cleaning. any ideas on what it might be?
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Hello, Could anyone identify the species of these two beetles from the La Brea Tar Pits of Los Angeles, California, USA? The large one is 3 cm and the small one is 1 cm. I've heard the terms "water beetle" and "carrion beetle" get thrown around but it's confusing. I think the larger might be Cybister explanatus? Thanks.
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I joined with the hopes that someone here may know more about Natlandite fossil stone. My wife inherited a polished three piece set and unfortunately there is very little information available about it online. Within the two articles I could find we have learned that "it was first discovered in 1954 in Los Angeles, Ca. by geologist Manley L. Natland, during a small dig he made in his offices backyard. He was given a rock brought up during soil testing for an annex to the old Atlantic Richfield Building at 6th and Flower streets. Natland estimated the fossil stone to be between 5 to 7 million years old and said that it was likely formed when an earthquake dislodged a great mass of sludge from the Los Feliz area (then the seashore) and moved it to the Arco site, where it solidified. He had it cut and polished, revealing shells of bivalves, gastropods and coral in a marble like material, but thought no more about it until 1969, after he had retired from Atlantic Richfield, now Arco. That year, he asked to examine the excavation site where the building and it's annex were being torn down to make way for Arco towers, now known as City National Plaza. What he found was an entire bed of the fossil stone that he had seen years earlier. Natland arranged to have 500 tons of it hauled away and eventually had the rock cut and shaped into tables and statuary. The rock is about as hard as quartz and it contains about 350 different species. It was also named the official gemstone of Los Angeles in 1981." I have spoken with a paleontologist here at our local museum of natural history and he stated that he believes that some record of the stones should be preserved in a museum, if that has not already happened. He gave me the contact information of a paleontologist at the Los Angeles County Museum of Natural History and suggested that I contact them, as they would be the most appropriate place to store such fossils. They are absolutely beautiful pieces and any info or suggestions will be greatly appreciated! Thank you so much for taking time to read my post. Brandon Massey
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