tag:blogger.com,1999:blog-5211670216140060946.post1833594138602231469..comments2024-03-17T18:37:36.377-07:00Comments on Geotripper: Picture of the Day - A Great Outcrop, Part 2Garry Hayeshttp://www.blogger.com/profile/00531226195147986457noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-5211670216140060946.post-47218189611464570472015-08-23T19:09:32.687-07:002015-08-23T19:09:32.687-07:00The welded tuff above and below the vitrophyre can...The welded tuff above and below the vitrophyre can be carved with a knife ... I wonder if it was used by native Americans for making pipes or fetishes.<br />Art<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-53185216834024707122010-10-26T12:42:36.368-07:002010-10-26T12:42:36.368-07:00Undergrad First Yr. Geo Student from Las Vegas her...Undergrad First Yr. Geo Student from Las Vegas here and I stumbled Upon your blog and at good time too! <br /> <br /><br /><br />I visited it there this weekend actually and it looked like an inigmite to me.<br />Rhyolitous Tuff flow followed by what may be a second flow. (Obsidian Vitrophyre) could have been the beginning of flow two cooling into glass because of the temperature difference of the volcanic debris and the ground surface; above it, may be the continuity of the flow.--Spoke to a proff after this, and he never brought up the remelting idea as you did.Very interesting!! --<br /><br />I identified a 3rd fault concurrent with the two normal faults shown here. (Did you notice similar breccia scarcely shown in the second fault exposed?) What an amazing road-cut this turned out to be!mindofanerudite.wordpress.comnoreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-77039044127834438212008-11-24T19:27:00.000-08:002008-11-24T19:27:00.000-08:00geology.csupomona.edu. made this field trip in 200...geology.csupomona.edu. made this field trip in 2004 as part of their Death Valley trip. There is a description under Death Valley (pdf file) on day 2.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-79401141750772580082008-03-05T04:51:00.000-08:002008-03-05T04:51:00.000-08:00Is there an definitive answer forthcoming? Inquir...Is there an definitive answer forthcoming? Inquiring minds want to know!Ron Schotthttps://www.blogger.com/profile/10020094512548523216noreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-77577178207241115812008-03-03T05:51:00.000-08:002008-03-03T05:51:00.000-08:00Yes, that's the same outcrop - from a grad school ...Yes, that's the same outcrop - from a grad school field trip back in 1975!<BR/><BR/>It looks like you have a dipping ash-flow-tuff vitrophyre, which usually develop in a horizontal, planar fashion, lying on also dipping volcanic and possiby volcaniclastic units. ?<BR/><BR/>I think these volcanic rocks are fairly young, 15 m.y. or younger?Silver Foxhttps://www.blogger.com/profile/03131032620978696727noreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-67859164399077009422008-03-02T21:55:00.000-08:002008-03-02T21:55:00.000-08:00Oooh. I never took this road, though I was as cl...Oooh. I never took this road, though I was as close as <A HREF="http://www.flickr.com/photos/rschott/2305973811/" REL="nofollow">Shoshone</A>. I did have a friend who did some of his masters work in the area, though, and if I recall correctly he mentioned a vitrophere in a roadcut near Shoshone. Putting two and two together, that black rock sure looks like a vitrophere. Now I'm kicking myself because I'd love to take a picture of that fault. I guess that gives me another excuse to head west again!Ron Schotthttps://www.blogger.com/profile/10020094512548523216noreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-79439931388603365152008-03-02T16:52:00.000-08:002008-03-02T16:52:00.000-08:00As I understand it, the event that produced these ...As I understand it, the event that produced these volcanics began out your way around the San Juans around 40 Ma and spread west to CaliforniaGarry Hayeshttps://www.blogger.com/profile/00531226195147986457noreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-38297114642830238062008-03-02T16:39:00.000-08:002008-03-02T16:39:00.000-08:00I think I've been to that outcrop (and have a samp...I think I've been to that outcrop (and have a sample from it).Kimhttps://www.blogger.com/profile/07738706550175991130noreply@blogger.com