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Showing results for tags 'volcanism'.
Found 18 results
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Simetite (Costa dell’Ambra, Lower to Middle Miocene (~20-12 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
“Simetite” Costa dell’Ambra Pachino, Syracuse Province, Sicily, Italy Lower to Middle Miocene (~20-12 Ma) Chemical Composition: C: 79.25%, H: 10.41%, O: 10.34%, S: 0.52-2.46% Specific Gravity: 1.056-1.068 Specimen A (Left): 0.6g / 20x10x8mm Specimen B (Center): 0.2g / 10x7x4mm Specimen C (Right): 0.4g / 13x8x8mm Lighting: 140lm LED Entry six of ten, detailing various rare ambers from European, Asian, and North American localities. This is an amber wi© Kaegen Lau
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Simetite (Costa dell’Ambra, Lower to Middle Miocene (~20-12 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
“Simetite” Costa dell’Ambra Pachino, Syracuse Province, Sicily, Italy Lower to Middle Miocene (~20-12 Ma) Chemical Composition: C: 79.25%, H: 10.41%, O: 10.34%, S: 0.52-2.46% Specific Gravity: 1.056-1.068 Specimen A (Left): 0.6g / 20x10x8mm Specimen B (Center): 0.2g / 10x7x4mm Specimen C (Right): 0.4g / 13x8x8mm Lighting: Longwave UV Entry six of ten, detailing various rare ambers from European, Asian, and North American localities. This is an amber© Kaegen Lau
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Simetite (Costa dell’Ambra, Lower to Middle Miocene (~20-12 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
“Simetite” Costa dell’Ambra Pachino, Syracuse Province, Sicily, Italy Lower to Middle Miocene (~20-12 Ma) Chemical Composition: C: 79.25%, H: 10.41%, O: 10.34%, S: 0.52-2.46% Specific Gravity: 1.056-1.068 Specimen A: 0.6g / 20x10x8mm Lighting: 140lm LED Entry six of ten, detailing various rare ambers from European, Asian, and North American localities. This is an amber with a rich history. Amber from the island of Sicily is thought to have been known of since the© Kaegen Lau
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Simetite (Costa dell’Ambra, Lower to Middle Miocene (~20-12 Ma)
Barrelcactusaddict posted a gallery image in Members Gallery
From the album: Fossil Amber and Copal: Worldwide Localities
“Simetite” Costa dell’Ambra Pachino, Syracuse Province, Sicily, Italy Lower to Middle Miocene (~20-12 Ma) Chemical Composition: C: 79.25%, H: 10.41%, O: 10.34%, S: 0.52-2.46% Specific Gravity: 1.056-1.068 Specimen C: 0.4g / 13x8x8mm Lighting: 140lm LED Entry six of ten, detailing vario© Kaegen Lau
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Pulsed volcanic combustion events and end-Permian ecosystem collapse and soil erosion
Oxytropidoceras posted a topic in Fossil News
Kaiho, K., Aftabuzzaman, M., Jones, D.S. and Tian, L., 2020. Pulsed volcanic combustion events coincident with the end-Permian terrestrial disturbance and the following global crisis. Geology. vol 49. Open access Researchgate PDF file of above paper PDF files of related papers Biswas, R.K., Kaiho, K., Saito, R., Tian, L. and Shi, Z., 2020. Terrestrial ecosystem collapse and soil erosion before the end-Permian marine extinction: Organic geochemical evidence from marine and non-marine records. Global and Planetary Chan -
Volcanic origin for Younger Dryas geochemical anomalies ca. 12,900 cal B.P.
Oxytropidoceras posted a topic in Fossil News
Texas cave sediment upends meteorite explanation for global cooling by Baylor University August 1, 2020 https://phys.org/news/2020-07-texas-cave-sediment-upends-meteorite.html The paper is: Sun, N, Brandon, A.D., Forman, S.L., Waters, M.R. and Befus, K.S., 2020. Volcanic origin for Younger Dryas geochemical anomalies ca. 12,900 cal B.P. Science Advances, 6(31), eaax8587 https://advances.sciencemag.org/content/6/31/eaax8587 Related papers: Holliday, V.T., Bartlein, P.J., Scott, A.C. and Marlon, J.R., 2020. Ext-
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- caves
- global cooling
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New insight into the Great Dying, Permian mass extinction
Oxytropidoceras posted a topic in Fossil News
New insight into the Great Dying, University of Leeds, June 11, 2020 https://phys.org/news/2020-06-insight-great-dying.html The open access paper is: Jacopo Dal Corso, Benjamin J. W. Mills, Daoliang Chu, Robert J. Newton, Tamsin A. Mather, Wenchao Shu, Yuyang Wu, Jinnan Tong, and Paul B. Wignall (2020) Permo-Triassic boundary carbon and mercury cycling linked to terrestrial ecosystem collapse. Nature Communications 11, Article number: 2962 doi: https://doi.org/10.1038/s41467-020-16725-4 https://www.nature.com/articles/s41467-02- 2 replies
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- permian mass extinction
- great dying
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Permian coal-burning by Siberian Traps in Siberia led to climate change
Oxytropidoceras posted a topic in Fossil News
Coal-burning in Siberia led to climate change 250 million years ago, Arizona State University https://asunow.asu.edu/20200615-coal-burning-siberia-led-climate-change-250-million-years-ago Elkins-Tanton, L.T., Grasby, S.E., Black, B.A., Veselovskiy, R.V., Ardakani, O.H. and Goodarzi, F., 2020. Field evidence for coal combustion links the 252 Ma Siberian Traps with global carbon disruption. Geology, 48. (open access) https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47365.1/587319/Field-evidence-for-coal-combustion-links-the-252-
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- mass extinction
- permian mass extinction
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Late Ordovician mass extinction - volcanism and warming or cooling and glaciation?
Oxytropidoceras posted a topic in Fossil News
There is a series of open access papers about what caused the Late Ordovician mass extinction. They are: Bond, D.P. and Grasby, S.E., 2020. Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation. Geology. https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47377.1/586486/Late-Ordovician-mass-extinction-caused-by Mitchell, C. E., and Melchin, M.J., 2020. COMMENT: Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation. Geology-
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- hirnantian
- lome
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Racki, G., 2020, Volcanism as a prime cause of mass extinctions: Retrospectives and perspectives, in Adatte, T., Bond, D.P.G., and Keller, G., eds., Mass Extinctions, Volcanism, and Impacts: New Developments: Geological Society of America Special Paper 544, p. 1–34 https://www.researchgate.net/publication/337951571_Volcanism_as_a_prime_cause_of_mass_extinctions_Retrospectives_and_perspectives https://www.researchgate.net/profile/Grzegorz_Racki Racki, G., Rakociński, M., Marynowski, L. and Wignall, P.B., 2018. Mercury enrichments and the Frasnian-Fa
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Yale University. "In death of dinosaurs, it was all about the asteroid -- not volcanoes." ScienceDaily. ScienceDaily, 16 January 2020. https://www.sciencedaily.com/releases/2020/01/200116141708.htm Meteorite or Volcano? New Clues to the Dinosaurs’ Demise Twin calamities marked the end of the Cretaceous period, and scientists are presenting new evidence of which drove one of Earth’s great extinctions. New York Times, January 16, 2020 https://www.nytimes.com/2020/01/16/science/dinosaurs-extinction-meteorite-volcano.html The paper is:
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- cretaceous-paleogene extinction
- deccan traps
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Siberian gas venting and the end-Permian environmental crisis
Oxytropidoceras posted a topic in Fossil News
Below is an interesting paper, with PDF files online, about the role of contact metamorphism of evaporites and organic rich strata by the Siberian Traps and the end-Permian extinctions. Svensen, H., Planke, S., Polozov, A.G., Schmidbauer, N., Corfu, F., Podladchikov, Y.Y. and Jamtveit, B., 2009. Siberian gas venting and the end-Permian environmental crisis. Earth and Planetary Science Letters, 277(3-4), pp.490-500. http://folk.uio.no/hensven/Svensen_EPSL_2009.pdf https://henriksvensen.wordpress.com/publicationspapers/ https://h- 1 reply
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- siberian traps
- permian extinction
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End-Permian (252 Mya) deforestation, wildfires and flooding (open access paper)
Oxytropidoceras posted a topic in Fossil News
Below is a very interesting open access paper. Vajda, V., McLoughlin, S., Mays, C., Frank, T.D., Fielding, C.R., Tevyaw, A., Lehsten, V., Bocking, M. and Nicoll, R.S., 2020. End-Permian (252 Mya) deforestation, wildfires and flooding—An ancient biotic crisis with lessons for the present. Earth and Planetary Science Letters, 529, p.115875. https://www.sciencedirect.com/science/article/pii/S0012821X19305679 Yours, Paul H.- 1 reply
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- end-permian extinction
- mass-extinction
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More Evidence for volcanism as cause of Permian mass extinction
Oxytropidoceras posted a topic in Fossil News
New evidence suggests volcanoes caused biggest mass extinction ever Mercury found in ancient rock around the world supports theory that eruptions caused 'Great Dying' 252 million years ago. University of Cincinnati, Science Daily, April 15, 2019 https://www.sciencedaily.com/releases/2019/04/190415122249.htm The open access paper is: Jun Shen, Jiubin Chen, Thomas J. Algeo, Shengliu Yuan, Qinglai Feng, Jianxin Yu, Lian Zhou, Brennan O’Connell, Noah J. Planavsky. Evidence for a prolonged Permian–Triassic extinction interval from global mar-
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- permian mass extinction
- great dying
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Here's Why Over 80% of All Life on Earth Was Wiped Out 250 Million Years Ago. A chain reaction of death. https://www.sciencealert.com/end-permian-triassic-extinction-event-volcano-eruption-lithospheric-halogens https://www.sciencedaily.com/releases/2018/08/180827121348.htm https://phys.org/news/2018-08-geologists-uncover-clues-largest-mass.html https://www.eurekalert.org/pub_releases/2018-08/uota-gun082418.php the paper is: Michael W. Broadley, Peter H. Barry, Chris J. Ballentine, Lawrence A. Taylor and Ray Burgess, 2018, End-Permian
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- volcanic volatiles
- volcanism
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Seafloor Data Point to Global Volcanism after Chicxulub Impact
Oxytropidoceras posted a topic in Fossil News
The dinosaur-murdering asteroid maybe also triggered an underwater volcano meltdown. Why pick just one flavor of apocalypse? By Rachel Becker, The Verge, Feb 7, 2018 https://www.theverge.com/2018/2/7/16988112/asteroid-chicxulub-mass-extinction-dinosaurs-underwater-volcanoes-magma Seafloor data point to global volcanism after Chicxulub meteor strike, University of Oregon, February 7, 2018 https://www.eurekalert.org/pub_releases/2018-02/uoo-sdp020518.php https://around.uoregon.edu/content/one-two-punch-may-have-helped-deck-dinosaurs The pape -
Volcanic eruptions triggered dawn of the dinosaurs (Huge pulses of volcanic activity are likely to have played a key role in triggering the end Triassic mass extinction, which set the scene for the rise and age of the dinosaurs, new Oxford University research has found.) http://www.heritagedaily.com/2017/06/volcanic-eruptions-triggered-dawn-dinosaurs/115652 https://www.sciencedaily.com/releases/2017/06/170619151530.htm Dinosaurs got an evolutionary assist from huge volcanic eruptions by Mary Beth Griggs Popular Science http://www.popsci
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A volcanic trigger for the Late Ordovician mass extinction? (Open Access PDF)
Oxytropidoceras posted a topic in Fossil News
Interesting open access paper on mass extinctions. Jones, D. S., A. M. Martini, D. A. Fike, and K. Kaiho, 2017, A volcanic trigger for the Late Ordovician mass extinction? Mercury data from south China and Laurentia. Geology v. 45; no. 7; p. 631–634 http://geology.geoscienceworld.org.libezp.lib.lsu.edu/content/45/7/631 http://geology.geoscienceworld.org.libezp.lib.lsu.edu/content/45/7 Yours, Paul H.