Bradley D. Cramer, Daniel J. Condon, Ulf Söderlund, Carly Marshall, Graham J. Worton, Alan T. Thomas, Mikael Calner, David C. Ray, Vincent Perrier, Ian Boomer, P. Jonathan Patchett, Lennart Jeppsson: U-Pb (zircon) age constraints on the timing and duration of Wenlock (Silurian) paleocommunity collapse and recovery during the “Big Crisis”. In: Geological Society of America (Bulletin). 124. Jahrgang, Nr.11–12, Oktober 2012, S.1841–1857, doi:10.1130/B30642.1 (englisch, researchgate.net [PDF]).
researchgate.net
Bradley D. Cramer, Daniel J. Condon, Ulf Söderlund, Carly Marshall, Graham J. Worton, Alan T. Thomas, Mikael Calner, David C. Ray, Vincent Perrier, Ian Boomer, P. Jonathan Patchett, Lennart Jeppsson: U-Pb (zircon) age constraints on the timing and duration of Wenlock (Silurian) paleocommunity collapse and recovery during the “Big Crisis”. In: Geological Society of America (Bulletin). 124. Jahrgang, Nr.11–12, Oktober 2012, S.1841–1857, doi:10.1130/B30642.1 (englisch, researchgate.net [PDF]).