tag:blogger.com,1999:blog-5192250381057989170.post612355737302931839..comments2024-03-29T02:36:17.560-06:00Comments on In the Company of Plants and Rocks: Mysterious Green Rock, continuedHollishttp://www.blogger.com/profile/10788942181934895493noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-5192250381057989170.post-13937009813541210012024-03-29T01:10:12.011-06:002024-03-29T01:10:12.011-06:00I have found lots of rocks like these in creek bed...I have found lots of rocks like these in creek beds in Santa Rosa, CA, in the Franciscan complex. I think they are Serpentine at some state of metamorphosis. Lots of my samples are tan or gray or orangish-gray on the outside, sometimes with web-like patterns, and there are visible bulges of magnetite. I'd love to learn what the tan material is. Anyone want to collaborate on that? My email is phernday@sonic.net. Thanks - PaulPaulhttps://www.blogger.com/profile/08925394993537115084noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-63442092338310224382022-03-04T07:06:00.402-07:002022-03-04T07:06:00.402-07:00It doesn't look green enough to be serpentine,...It doesn't look green enough to be serpentine, but photo colors could be misleading.Rashahttps://www.blogger.com/profile/11818396601574303305noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-28154616330401703422013-02-11T18:40:58.319-07:002013-02-11T18:40:58.319-07:00It will be great to see those photos!It will be great to see those photos!Hollishttps://www.blogger.com/profile/10788942181934895493noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-32113279922912968882013-02-11T14:13:56.385-07:002013-02-11T14:13:56.385-07:00Sorry I didn't catch your response in the prev...Sorry I didn't catch your response in the previous post- I could've been clearer. When I said "tectonized" I meant to imply that it had been metamorphosed both cataclastically, and almost always hydrated to some extent. So a good deal of the original ultramafic minerals would have (chemically) altered to serpentine minerals at the same time the rock was being (physically) crushed. In other words, two different processes taking place at the same time.<br /><br />Dana and I are hoping to get down to the Josephine Ophiolite some time this year, though we haven't scheduled that trip yet. You can rest assured I'll get plenty of photos of very similar rocks in the wild.Lockwoodhttps://www.blogger.com/profile/05960762797349483760noreply@blogger.com