tag:blogger.com,1999:blog-30940686.post1954015321373093576..comments2024-02-11T22:49:17.311-08:00Comments on Arizona Geology: USGS releases new geologic time scaleLee Allisonhttp://www.blogger.com/profile/11520300956249160005noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-30940686.post-55479817960363589882012-09-16T11:55:19.560-07:002012-09-16T11:55:19.560-07:00I need a timeline on The Triassic time period.I need a timeline on The Triassic time period.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-30940686.post-69070207575902456132010-07-22T15:56:38.356-07:002010-07-22T15:56:38.356-07:00Randy forwarded this comment:
It's a shame th...Randy forwarded this comment:<br /><br />It's a shame this is already out of date. I'm not sure why they didn't incorporate the revisions of Walker & Geismann (2009). For example, we've known that the base of the Late Triassic is older than 228 Ma for four years - see Furin et al. (2006).<br /><br />Furin, S., Preto, N., Rigo, M., Roghi, G., Gianolla, P., Crowley, J.L., and Bowring, S.A., 2006, High-precision U-Pb zircon age from the Triassic of Italy: implications for the Triassic time scale and the Carnian origin of calcareous nannoplankton and dinosaurs: Geology, v. 34, p. 1009-1012.<br /><br />Walker, J.D., and Geissman, J.W., 2009, GSA geologic time scale: GSA Today, v. 19, p. 60-61.Anonymousnoreply@blogger.com