tag:blogger.com,1999:blog-8693614218792476252.post4365910540682217859..comments2024-03-09T08:06:26.066-08:00Comments on Looking For Detachment: Geology on the Road: Highway 50 #3Silver Foxhttp://www.blogger.com/profile/03131032620978696727noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-8693614218792476252.post-52346824529512852008-05-29T08:09:00.000-07:002008-05-29T08:09:00.000-07:00Thanks for all the references, Kim and coconino. A...Thanks for all the references, Kim and coconino. And Kim, a Laramide blog post would be great, although I agree, it could be difficult!<BR/><BR/>MJC, I'm glad you enjoyed revisiting the area through these posts. I'm hoping that my little posts about roadside geology (so far mostly highway 50) will be interesting to travelers as well as to us geo-types.<BR/><BR/>In my travels so far, I haven't driven off the highway to the garnet fields, but have that on my list of places to go and things to see.Silver Foxhttps://www.blogger.com/profile/03131032620978696727noreply@blogger.comtag:blogger.com,1999:blog-8693614218792476252.post-26764882603080666062008-05-27T21:12:00.000-07:002008-05-27T21:12:00.000-07:00I enjoyed seeing that spot again. UNR field camp m...I enjoyed seeing that spot again. UNR field camp mapped the intrusion and the faults in a general way as one of the first exercises back in 1984 when I was lab assistant. It is always fun to hunt for the garnets, too!Garry Hayeshttps://www.blogger.com/profile/00531226195147986457noreply@blogger.comtag:blogger.com,1999:blog-8693614218792476252.post-32959872595333861422008-05-27T15:11:00.000-07:002008-05-27T15:11:00.000-07:00More: I think Wernicke has moved on to other thin...More: I think Wernicke has moved on to other things, but Axen has still done field camp near Pioche and at least some work in the B&R in more recent times.coconinohttps://www.blogger.com/profile/12050625735753145388noreply@blogger.comtag:blogger.com,1999:blog-8693614218792476252.post-44706600168316216222008-05-27T15:09:00.000-07:002008-05-27T15:09:00.000-07:00Best to add these to your B&R extension cite colle...Best to add these to your B&R extension cite collections (there's more, I'm sure, but these are ones I know):<BR/><BR/>Wernicke, B.P. and Axen, G.J., On the role of isostasy in the evolution of normal fault systems: Geology, v. 16, p. 848-851.<BR/><BR/>Wernicke, B.P., Axen, G.J., and Snow, J.K., Basin and Range extensional tectonics at the latitude of Las Vegas, Nevada: Geological Society of America Bulletin, v. 100, p. 1738-1757.coconinohttps://www.blogger.com/profile/12050625735753145388noreply@blogger.comtag:blogger.com,1999:blog-8693614218792476252.post-88506320119362699932008-05-27T13:48:00.000-07:002008-05-27T13:48:00.000-07:00Pete DeCelles did a nice job compiling all the dat...Pete DeCelles did a nice job compiling all the data (as of 2004) about the timing of thrusting from late Jurassic to Eocene in the western US.<BR/><BR/>(DeCelles, P., Late Jurassic to Eocene evolution of the Cordilleran thrust belt and foreland basin system, western USA: American Journal of Science, v. 304, p. 105-168.)<BR/><BR/>The work he cites on thrust faulting in Nevada is by Speed (1977, 1978, 1983), Oldow (1983, 1984, 1990, 1993), Wyld (2001, 2002), and Taylor and others (2000).<BR/><BR/>There's also work on the metamorphism of the area north of there (Ruby Mts, Pequop Mtns) by Al McGrew and Phyllis Camilleri (and others) - they've got metamorphic evidence for when the shortening/thickening vs extension occurred. And then there's a recent paper in GSA Bulletin by Wells and Hoisch about Cretaceous extension in Nevada. (I need to blog about this, because I think it's interesting. But I need to figure out how to explain the Laramide orogeny in a way that's both accurate and clear and reflects all the controversies around it, and I'm not sure I'm up to it at the moment.)<BR/><BR/>You could probably get maps that Eric Seedorf and Phil Gans made, if you e-mailed them. (I think they both did their dissertations in that area, and they would have good reasons for telling thrust faults from normal faults.)Kimhttps://www.blogger.com/profile/07738706550175991130noreply@blogger.com