tag:blogger.com,1999:blog-5211670216140060946.post7046529606610478138..comments2024-03-17T18:37:36.377-07:00Comments on Geotripper: It Seems That Half the Volcano is Missing: Travels at Pinnacles National ParkGarry Hayeshttp://www.blogger.com/profile/00531226195147986457noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5211670216140060946.post-32041286421243952212017-12-04T20:07:17.386-08:002017-12-04T20:07:17.386-08:00From what I understand, the rocks of Pinnacles san...From what I understand, the rocks of Pinnacles sank into a fault valley (graben) fairly soon after they were separated from Neenach which protected them from erosion. This didn't happen at Neenach, so those rocks have been undergoing erosion for a long time. The Gabilan Range was uplifted just within the last 2-3 million years so the erosion is much fresher and more rugged. That's how I understand it anyway.Garry Hayeshttps://www.blogger.com/profile/00531226195147986457noreply@blogger.comtag:blogger.com,1999:blog-5211670216140060946.post-82223672404729193182017-12-01T18:27:04.632-08:002017-12-01T18:27:04.632-08:00Is there an explanation for why the Pinnacles half...Is there an explanation for why the Pinnacles half is so dramatic and the Neenach half is barely noticeable? I wouldn't imagine the Neenach half was more eroded, at least not recently due to the arid climate. But as you've taught me, time changes everything. Was Neenach eroded in a more wet climate in the past?Anonymousnoreply@blogger.com