Search the Community
Showing results for tags 'geochronology'.
-
Dating Late Pleistocene Missoula Floods (Channel Scablands, Oregon, Washington)
Oxytropidoceras posted a topic in Geology
Below is a great lecture about dating the Missoula floods and the Channel Scablands that they created. Dating the Ice Age Floods Nick Zentner, Central Washington University CWU's Nick Zentner presents 'Dating the Ice Age Floods' - the 22nd talk in his ongoing Downtown Geology Lecture Series. Recorded at Hal Holmes Center on March 7, 2018 in Ellensburg, Washington, USA. Yours, Paul H.-
- geochronology
- lecture
-
(and 5 more)
Tagged with:
-
Richard Fortey on the Trilobite Chronometer Geology Bites • Nov 06, 2021 The ‘trident’ trilobites of Morocco Dr Kendal Martyn (UK), Deposits Magazine Yours, Paul H.
- 1 reply
-
- geochronology
- guide fossils
-
(and 3 more)
Tagged with:
-
Tree rings may hold clues to impacts of distant supernovas on Earth University of Colorado at Boulder, November 11, 2020 https://www.sciencedaily.com/releases/2020/11/201111144400.htm Tree rings may hold clues to earthly impacts of distant supernovas https://www.sciencealert.com/traces-of-supernovae-could-be-locked-in-the-rings-of-ancient-trees https://sciencesprings.wordpress.com/2020/11/14/from-university-of-colorado-boulder-tree-rings-may-hold-clues-to-earthly-impacts-of-distant-supernovas/ The paper is; Brakenridge, G.R., Solar system exposure to supernova γ radiation. International Journal of Astrobiology, pp.1-14. Yours, Paul H.
-
- 2
-
- c14
- dendrochronology
- (and 6 more)
-
What Fossils Alone Can’t Explain About Dinosaurs When time is measured in 10-million-year blocks, the lines between ecosystems and animals that would never have coexisted can get blurry. Laura Poppick, The Atlantic, August 17, 2019 https://www.theatlantic.com/science/archive/2019/08/paleontology-precision-problem/596176/ Yours, Paul H.
-
- 1
-
- dinosaurs
- geochronology
-
(and 5 more)
Tagged with:
-
How Do Scientists Date Fossils? Erin DiMaggio and Alka Tripathy-Lang Geologists Erin DiMaggio and Alka Tripathy-Lang, Smithsonian explain techniques for targeting the age of a fossil find https://www.smithsonianmag.com/smithsonian-institution/how-do-scientists-date-fossils-180972391/ Inside the National Museum of Natural History's New Fossil Hall https://www.smithsonianmag.com/science-nature/beyond-dinosaurs-secrets-earths-past-180972292/ yours, Paul H.
- 4 replies
-
- 1
-
- fossil hall
- geochronology
- (and 2 more)
-
Ancient ‘Snowball Earth’ thawed out in a flash By Lucas Joel, Apr. 2, 2019 , 10:50 AM https://www.sciencemag.org/news/2019/04/ancient-snowball-earth-thawed-out-flash The paper is: Zhou, C., Huyskens, M.H., Lang, X., Xiao, S. and Yin, Q.Z., 2019. Calibrating the terminations of Cryogenian global glaciations. Geology, 47(3), pp.251-254. https://pubs.geoscienceworld.org/gsa/geology/article-abstract/47/3/251/568701/calibrating-the-terminations-of-cryogenian-global?redirectedFrom=fulltext An earlier article is: Ancient Earth froze over in a geologic instant By Lucas Joel Jun. 7, 2018 , 4:40 PM https://www.sciencemag.org/news/2018/06/ancient-earth-froze-over-geologic-instant The paper for this article is: MacLennan, S., Park, Y., Swanson-Hysell, N., Maloof, A., Schoene, B., Gebreslassie, M., Antilla, E., Tesema, T., Alene, M. and Haileab, B., 2018. The arc of the Snowball: U-Pb dates constrain the Islay anomaly and the initiation of the Sturtian glaciation. Geology, 46(6), pp.539-542. http://www.princeton.edu/geosciences/people/maloof/papers_pub/54Maloof.pdf Also, there is: Rooney, A.D., Strauss, J.V., Brandon, A.D. and Macdonald, F.A., 2015. A Cryogenian chronology: Two long-lasting synchronous Neoproterozoic glaciations. Geology, 43(5), pp.459-462. https://projects.iq.harvard.edu/files/fmacdonald/files/rooney_etal_geology_2015.pdf https://www.researchgate.net/profile/Alan_Rooney https://www.researchgate.net/publication/275523064_A_Cryogenian_chronology_Two_long-lasting_synchronous_Neoproterozoic_glaciations Yours, Paul H.
-
- 1
-
- cryogenian
- geochronology
- (and 6 more)
-
Diamond’s 2-billion-year Growth Recorded Tectonic Shifts
Oxytropidoceras posted a topic in Rocks & Minerals
Diamond’s 2-billion-year growth charts tectonic shift in early Earth’s carbon cycle, Europlanet Media Centre, February 23, 2017 http://www.europlanet-eu.org/2-billion-year-old-diamond/ http://www.europlanet-eu.org/wp-content/uploads/2017/02/catholuminescence_composite.jpg https://www.sciencedaily.com/releases/2017/02/170223102126.htm Timmerman, S., J.M. Koornneef, I.L. Chinn, G.R. Davies, 2017, Dated eclogitic diamond growth zones reveal variable recycling of crustal carbon through time. Earth and Planetary Science Letters, 2017; 463: 178 DOI: 10.1016/j.epsl.2017.02.001 http://www.sciencedirect.com/science/article/pii/S0012821X17300614 Yours, Paul H.-
- crustal carbon
- diamond
- (and 4 more)