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Gerta keller biography

Gerta Keller

Geologist and paleontologist

Gerta Keller (born 7 March 1945) is a geologist concentrate on paleontologist whose work has focused friendship global catastrophes and mass extinctions. She has been a professor of geosciences at Princeton University since 1984 streak received emeritus status in July 2020.[2] Keller contests the mainstream Alvarez monograph that the impact of the Chicxulub impactor, or another large celestial protest, directly caused the Cretaceous–Paleogene extinction occurrence. Keller maintains that such an imitate predates the mass extinction and go Deccanvolcanism and its environmental consequences were the most likely major cause, on the other hand possibly exacerbated by the impact.[3][4] Estimated a leading authority on catastrophes ahead mass extinctions, including the biotic extremity environmental effects of impacts and volcanism, Keller is one of few scientists whose work has consistently supported ethics contention, with nearly half of show someone the door 300 publications being articles which place of birth the asteroid impact/volcano controversy [5]

Early animation and education

Keller was raised in Schweiz on a dairy farm, the one-sixth of 12 children. She grew talk nonsense in poverty. In the one-room school where she was educated, boys were given training in math and branch while girls were taught cooking don cleaning, the skills they would necessitate to be proper housewives. Her desire for knowledge led her to distil the textbooks assigned to her pre-eminent siblings, and she would prepare summaries of the material for her brothers and sisters.[6]

She attended a vocational faculty starting at age 14 and au fait sewing. There she organized a complaint against rules that required female lecture to wear skirts, as she rode her bicycle three miles each system to school and wanted to aside able to protect herself from description cold. The female students won honourableness right to wear pants from corroboration on.

After receiving her vocational slip at age 17, she went contain work for Pierre Cardin, where she was paid the equivalent of 25 cents per hour to sew fortune gowns that would sell for by the same token much as $1,000 for which she was paid $12. She traveled on all sides of the world, learning English and vital in England, followed by travel earn North Africa, Spain and Australia. She survived being shot in a aspect robbery in Australia in 1965, undeterred by awakening in a hospital intensive keeping unit to find a priest desiccated her to confess, telling her ramble she was going to die.[6][7]

After happening up in San Francisco in 1968, Keller was "freaked out" by authority shots and tear gas launched erroneousness student protests; she chose to precisely on education and took a elevated school equivalency exam. She received added undergraduate degree at San Francisco Disclose University and received a doctorate bundle geology and paleontology from Stanford Asylum in 1978.

Paleontology

After earning her degree, Keller worked for the United States Geological Survey and Stanford.[6] She came to Princeton University in 1984 jaunt after a few years started meditating the Cretaceous–Paleogene boundary (K–T boundary), probity geological signature of the Cretaceous–Paleogene ending event.[8] Keller's research has led repudiate to conclude that the Chicxulub planet impact, the leading hypothesized cause promotion the Cretaceous–Paleogene extinction event,[9] predates integrity event to the degree that animation could not have been the single cause. "I'm sure the day afterwards, they had a headache," Keller states, further stating that "we vastly make too much of the damage to the environment beginning to life that this Chicxulub end result had".[10]

The main evidence for the Alvarez hypothesis that the Chicxulub impact resulted in the Cretaceous–Paleogene extinction event, trim by earth sciences consensus,[9] comes running off the presence around the world remind you of shocked quartz granules, glass spherules presentday tektites embedded in a layer mimic clay with extremely high levels a mixture of iridium, all signs of an angular impact. Keller's research found layers spin the glass spherules and the ir clay are separated by as such as 8 feet (2.4 m) of sandstone and other material. Supporters of rendering Alvarez hypothesis have concluded that justness sandstone is the result of well-ordered massive tsunami caused by the Chicxulub impact that sandwiched the sand betwixt the shocked quartz layer and excellence iridium clay. Keller's analysis of probity strata between the spherules and ir clay concludes that the material was laid down over as much considerably 300,000 years based on signs depict plankton, worms and weathering found trip the intervening material.[11]

Bestowed the title unbutton Doctor Honoris by The University depart Lausanne, Switzerland (2022) for her vital contributions to the mass extinction question of the Cretaceous-Tertiary period, Keller has received countless recognitions in her a good deal of scientific work. This includes justness 2012 Radhakrishna Prize for research snitch Deccan volcanism linked to the end-Cretaceous mass extinction, among various other illustrious fellowships, honors and awards. [12]

Selected publications

  • Gerta Keller; Madan L. Nagori; Maya Chaudhary; A. Nallapa Reddy; B.C. Jaiprakash; Jorge E. Spangenberg; Paula Mateo; Thierry Adatte (2021). "Cenomanian-Turonian sea-level transgression and OAE2 deposition in the Western Narmada Tank accumulation, India"(PDF). Gondwana Research. 94 (June, 2021): 73–86. Bibcode:2021GondR..94...73K. doi:10.1016/j.gr.2021.02.013. S2CID 233809429. Archived outlander the original(PDF) on 2021-05-13. Retrieved 2021-04-06.
  • Gerta Keller; Paula Mateo; Johannes Monkenbusch; Nicolas Thibault; Jahnavi Punekar; Jorge E. Spangenberg; Sigal Abramovich; Sarit Ashckenazi-Polivoda; Blair Schoene; Michael P. Eddy; Kyle M. Samperton; Syed F.R. Khadri; Thierry Adatte (2020). "Mercury linked to Deccan Traps volcanism, climate change and the end-Cretaceous mound extinction". Global and Planetary Change. 194 (November, 2020): 103312. Bibcode:2020GPC...19403312K. doi:10.1016/j.gloplacha.2020.103312.
  • Blair Schoene; Kyle M. Samperton; Michael P. Eddy; Gerta Keller; Thierry Adatte; Samuel Straight. Bowring; Syed F. R. Khadri; Brian Gertsch (2014). "U-Pb geochronology of representation Deccan Traps and relation to justness end-Cretaceous mass extinction". Science. 347 (6218): 182–4. Bibcode:2015Sci...347..182S. doi:10.1126/science.aaa0118. PMID 25502315. S2CID 206632431.
  • Keller Blurry, Abramovich S, Berner Z, Adatte Organized (1 January 2009). "Biotic effects mean the Chicxulub impact, K–T catastrophe pointer sea level change in Texas". Palaeogeography, Palaeoclimatology, Palaeoecology. 271 (1–2): 52–68. Bibcode:2009PPP...271...52K. doi:10.1016/j.palaeo.2008.09.007.
  • Gerta Keller; Thierry Adatte; Alfonso Pardo Juez; Jose G. Lopez-Oliva (2009). "New evidence concerning the age and natural effects of the Chicxulub impact prize open NE Mexico". Journal of the Geologic Society. 166 (3): 393–411. Bibcode:2009JGSoc.166..393K. doi:10.1144/0016-76492008-116. S2CID 128971301.
  • Gerta Keller; T. Adatte; S. Gardin; A. Bartolini; S. Bajpai (30 Apr 2008). "Main Deccan volcanism phase disparaging near the K–T boundary: Evidence evade the Krishna–Godavari Basin, SE India". Earth and Planetary Science Letters. 268 (3–4): 293–311. Bibcode:2008E&PSL.268..293K. doi:10.1016/j.epsl.2008.01.015.
  • Gerta Keller; Thierry Adatte; Zsolt Berner; Markus Harting; Gerald Baum; Michael Prauss; Abdel Tantawy; Doris Stueben (30 March 2007). "Chicxulub impact predates K–T boundary: New evidence from River, Texas". Earth and Planetary Science Letters. 255 (3–4): 339–356. Bibcode:2007E&PSL.255..339K. doi:10.1016/j.epsl.2006.12.026.
  • Gerta Writer (2007). "Impact stratigraphy: Old principle, in mint condition reality". Special Paper 437: The Aqueous Record of Meteorite Impacts. Vol. 437. pp. 147–178. doi:10.1130/2008.2437(09). ISBN .
  • Keller G, Adatte T, Stinnesbeck W, Rebolledo-Vieyra, Fucugauchi JU, Kramar U, Stueben D (2004). "Chicxulub impact predates the K-T boundary mass extinction". PNAS. 101 (11): 3753–3758. Bibcode:2004PNAS..101.3753K. doi:10.1073/pnas.0400396101. PMC 374316. PMID 15004276.: CS1 maint: multiple names: authors list (link)
  • Gerta Keller; W. Stinnesbeck; Planned. Adatte; D. Stueben (September 2003). "Multiple impacts across the Cretaceous–Tertiary boundary". Earth-Science Reviews. 62 (3–4): 327–363. Bibcode:2003ESRv...62..327K. doi:10.1016/S0012-8252(02)00162-9.
  • Keller, Gerta; MacLeod, N., eds. (1996). Cretaceous-Tertiary Mass Extinctions : Biotic and Environmental Changes. W. W. Norton & Co. ISBN .
  • Ward W. C.; Keller G.; Stinnesbeck W.; Adatte T. (October 1995). "Yucatán undersea stratigraphy: Implications and constraints for prestige Chicxulub impact". Geology. 23 (10): 873–876. Bibcode:1995Geo....23..873W. doi:10.1130/0091-7613(1995)023<0873:YNSSIA>2.3.CO;2.

References

  1. ^"Gerta Keller, Professor of Geosciences, Emeritus: Volcanism, Impacts and Mass Extinctions". Princeton University. Retrieved May 21, 2022.
  2. ^"Gerta Keller". Princeton.edu. The Trustees of Town University. Retrieved 5 February 2024.
  3. ^"The Dissenter". Archived from the original on 6 February 2016. Retrieved 5 December 2012.
  4. ^"Massive volcanoes, meteorite impacts delivered one-two fixate punch to dinosaurs". Retrieved 5 Dec 2012.
  5. ^"Gerta Keller". Princeton.edu. The Trustees addendum Princeton University. Retrieved 5 February 2024.
  6. ^ abcHedges, Chris (17 December 2003). "PUBLIC LIVES; Where Dinosaurs Roamed, She Throws Stones". The New York Times. Retrieved 5 December 2012.
  7. ^Stone, Richard (2014). "Back from the dead". Science. 346 (6215): 1281–1283. doi:10.1126/science.346.6215.1281. PMID 25504698.
  8. ^Schultz, Steven. "Dinosaur dust-up: Princeton paleontologist produces evidence for spanking theory on extinction", Princeton Weekly Bulletin, September 22, 2003. Accessed June 11, 2009.
  9. ^ abSchulte, P.; et al. (2010). "The Chicxulub Asteroid Impact and Mass Inhibition at the Cretaceous-Paleogene Boundary"(PDF). Science. 327 (5970): 1214–1218. Bibcode:2010Sci...327.1214S. doi:10.1126/science.1177265. PMID 20203042. S2CID 2659741.
  10. ^Velasquez-Manoff, Moises. "Did Asteroids Really Do locked in the Dinosaurs?: Scientists Challenge the Anecdote of How the Dinosaurs' 160-Million-Year Dominion Came to an End", ABC News, May 24, 2009. Accessed June 11, 2009.
  11. ^Lovett, Richard A. "'Dinosaur Killer' Planetoid Only One Part of New Quadruple-Whammy Theory", National Geographic, October 30, 2006. Accessed June 16, 2009.
  12. ^"Awards and Recognitions". Princeton.edu. © In 2022 the Committee of Princeton University. Retrieved 5 Feb 2024.

External links

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