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Not sure anybody noticed this volcanic crater feature at the Yellowstone. I recently saw this using Goes East map, it really stands out. The last supereruption of the Yellowstone Caldera, the Lava Creek eruption 640,000 years ago, ejected approximately 1,000 cubic kilometres (240 cu mi) of rock, dust and volcanic ash into the atmosphere. Overlying land collapses into the emptied magma chamber, forming a geographic depression called a caldera. Don't think that was a dried out lake bed existed during the last ice age.
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Camp, V.E., and Wells, R.E., 2021 The Case for a Long-Lived and Robust Yellowstone Hotspot. GSA Today. vo. 31, no. 1, pp. 4-10. Abstract of Paper PDF of paper Ciborowski, T.J.R., Phillips, B.A., Kerr, A.C., Barfod, D.N. and Mark, D.F., 2020. Petrogenesis of Siletzia: The World's youngest Oceanic Plateau. Results in Geochemistry, p.100004. Yours, Paul H.
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New Yellowstone supereruptions discovered - it might be calming down
Oxytropidoceras posted a topic in Geology
What the New Discovery of Ancient Super-Eruptions Indicates for the Yellowstone Hotspot Geological Society Of America, SciTechDaily, June 21, 2020 https://scitechdaily.com/what-the-new-discovery-of-ancient-super-eruptions-indicates-for-the-yellowstone-hotspot/ Yellowstone’s Supervolcano Is a Hot Spot, but It May Be Calming Down. Some researchers interpret a new timeline of some of the formation’s biggest eruptions as evidence that its activity is waning. by Matt Kaplan, New York Times, June 18, 2020 https://www.nytimes.com/2020/06/18/science/yellowstone-supervolcano-eruption.html Biggest Ever Yellowstone Eruption Revealed. The ancient supervolcano under the national park was much more explosive in its early history and could be slowing down, a new study suggests By SHannon Hall, Scientific American, June 15, 2020 https://www.scientificamerican.com/article/biggest-ever-yellowstone-eruption-revealed1/ The open access paper is: Knott, T.R., Branney, M.J., Reichow, M.K., Finn, D.R., Tapster, S., and Coe, R.S. 2020, Discovery of two new super-eruptions from the Yellowstone hotspot track (USA): Is the Yellowstone hotspot waning?” Geology. June 1, 2020, DOI: 10.1130/G47384.1 https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47384.1/586793/Discovery-of-two-new-super-eruptions-from-the Yours, Paul H.-
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Just moved 40 to the SE of Yellowstone National Park in NW Wyoming. We have been finding these in the excavation of the house. They are located in a greenish clay layer just above a rocky layer approximately 12 feet below the surface. They are sedimentary balls that, when broken open, have a smaller, more hard type of rock or maybe fossil inside. We find them in different sizes from 4-12 inches in diameter. Any help would be much appreciated. Edit - I believe they are rare double concretions.
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Does anyone else have an opinion on this article? http://www.geologypage.com/2018/07/yellowstone-super-volcano-has-a-different-history-than-previously-thought.html My opinion is that it will be proven false. It will be proven that the plume theory is still the best theory to explain the Yellowstone Hotspot. Plate subduction invariably creates a chain of volcanoes parallel to the plate edge (as in the Cascades). I can not see how a plate subduction would create the pattern found in the Yellowstone chain. A chain, which by the way, closely resembles island arcs in the Pacific which are plume driven.
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Thermomechanical Modeling Refines Subsurface Mapping of Yellowstone Caldera
Oxytropidoceras posted a topic in Geology
Scientists decipher the magma bodies under Yellowstone Computer modeling shows the presence of a thick crustal transition zone that may control the movement of magma emerging from the Earth's mantle, University of Oregon https://www.sciencedaily.com/releases/2018/04/180416185610.htm The paper is: D. P. Colón, I. N. Bindeman, T. V. Gerya. Thermomechanical modeling of the formation of a multilevel, crustal-scale magmatic system by the Yellowstone plume. Geophysical Research Letters, 2018; DOI: 10.1029/2018GL077090 https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL077090 Yours, Paul H.-
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Lowenstern, J.B., 2005, Truth, fiction, and everything in between at the Yellowstone Caldera. Geotimes, v. 50, no. 6, pp. 18-23. http://www.agiweb.org/geotimes/june05/feature_supervolcano.html Lowenstern, J.B., 2005, Truth, fiction, and everything in between at the Yellowstone Caldera. Yellowstone Science. (Reprinted from Geotimes) v. 13, no. 3, pp. 15-20 https://web.archive.org/web/20170130171721/http://www.colorado.edu/geography/class_homepages/geog_1011_f09/geog_1011_r1.pdf https://web.archive.org/web/20161204103602/https://www.nps.gov/yell/learn/upload/YS_13_3_sm.pdf Yellowstone Science: Past Issues https://www.nps.gov/yell/learn/yellowstone-science-issues.htm https://www.nps.gov/yell/learn/yellowstone-science.htm Yours, Paul H.
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Greetings all! Im a newish member to your site and am grateful to have such an amazing resource available for up and coming enthusiasts like myself. This summer,my family has planned a trip to yellowstone and the black hills. My kid sister is an avid fossil nut like myself and we are eager to get down in the dirt. Since we've never been out west before, i was hoping to get some pointers on destinations we should consider.... I'd like to keep as close to the interstate 90 and interstate 80 corridors as possible, so as not to further inconvenience the rest of my family. Cramming everyone into one car will provide enough frayed nerves as it is, and i'd like to keep the stress to a minimum - any suggestions on things near fossil sites that i could send my siblings to would be excellent, every diversion will help! Also, i've read a few pages that suggest acquiring a fossiling permit? Is this legit? Most pages have informed me that vertebrates are off limits but i can dig around on any roadside for invertebrates to my hearts content. Im from Pennsylvania and our state has spoiled us for fossiling, as far as not requiring permits... I've heard that fossil quarries are a great place to go, if pricey - and im considering going to one of those - any suggestions on which? My sister really wants a fish fossil and the results seem to be good at the pay quarries, i was just wondering what the likelihood of hitting pay dirt is... oh, and has anyone been to cycad national park/monument (not sure which one it is, a park or a monument) ? Is it worth the stop? Any help would be greatly appreciated! Cheers!
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