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Oxytropidoceras posted a topic in Fossil NewsOldest mass animal stranding revealed in Death Valley fossils New Scientist Daily News, July 26, 2017 https://www.newscientist.com/article/2141881-oldest-mass-animal-stranding-revealed-in-death-valley-fossils/ The publications are: Sappenfield, A.D., Tarhan, L.G. and Droser, M.L., 2017. Earth's oldest jellyfish strandings: a unique taphonomic window or just another day at the beach?. Geological Magazine, 154(4), pp.859-874. Abstract: https://www.cambridge.org/core/journals/geological-magazine/article/earths-oldest-jellyfish-strandings-a-unique-taphonomic-window-or-just-another-day-at-the-beach/BD3A332A705E4AFB44E32FFAD2060D56 PDF file: https://www.researchgate.net/publication/303955816_Earth's_oldest_jellyfish_strandings_a_unique_taphonomic_window_or_just_another_day_at_the_beach Sappenfield, A.D., 2015. Precambrian-Cambrian Sedimentology, Stratigraphy, and Paleontology in the Great Basin (Western United States). Unpublished PhD dissertation. University of California, Riverside. http://escholarship.org/uc/item/4r02d6xr Yours, Paul H.
This egg shaped specimen is from the western great basin, found in a recent washout of loose sediment. There are other specimens and what appear to be fossilized bones in the photos provided. I inadvertently stepped on some before realizing what they were, but the disturbed area is minimal.winter is just beginning in the area so weather has not been extreme up to now. Know idea how long the site was exposed but no evidence of others having disturbed the area. I'm strictly amateur hiker but the terrain is obviously volcanic formation I can describe site more accurately if interested. The only egg shape I disturbed was split and the two halves were approx 3ft apart and fit together as seen in photos. I moistened the surface to highlight detail of embryo