tag:blogger.com,1999:blog-5192250381057989170.post5535537891322865213..comments2024-03-26T16:53:48.618-06:00Comments on In the Company of Plants and Rocks: A Notable and Mysterious RockHollishttp://www.blogger.com/profile/10788942181934895493noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-5192250381057989170.post-83889903352299872812023-05-09T17:41:35.860-06:002023-05-09T17:41:35.860-06:00It's a geode lol 😆😂It's a geode lol 😆😂Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-36092589284656361672014-12-06T18:16:57.025-07:002014-12-06T18:16:57.025-07:00Hey, I have a rock that is sort of similar. Its ab...Hey, I have a rock that is sort of similar. Its about the size of a medium turtle, off white in color, about 10 pounds, and has the look of a brain or a turtle shell. I have tried to search what it is, but I have only come across a few other people with the same question. Is this some rare rock or something? Please help me identify this rock!!! Thank you!<br />Anonymoushttps://www.blogger.com/profile/12423540121980976401noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-85832506507200767062013-02-05T07:31:51.650-07:002013-02-05T07:31:51.650-07:00Thanks, Garry. Much appreciated. Right now, I...Thanks, Garry. Much appreciated. Right now, I'm leaning towards harzburgite. The rock is really dense, and must be pretty tough in the geological sense to be so big compared with other rocks there. Still investigating ...Hollishttps://www.blogger.com/profile/10788942181934895493noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-51167111279185650462013-02-05T00:24:13.598-07:002013-02-05T00:24:13.598-07:00I immediately thought of some kind of ultramafic r...I immediately thought of some kind of ultramafic rock like harzburgite or serpentine. Serpentine is the result when harzburgite is metamorphosed. In my experience, serpentine is not all that durable in river environments, so I lean more towards the harzburgite or some other closely related ultramafic rock.Garry Hayeshttps://www.blogger.com/profile/00531226195147986457noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-52067093581460531852013-02-04T14:23:11.592-07:002013-02-04T14:23:11.592-07:00wow, this is really cool, thanks Lockwood. I goog...wow, this is really cool, thanks Lockwood. I googled harzburgite and found the following image, again from San Benito Co. - "serpentinite (harzburgite with asbestos)" -- this is the closest thing image-wise that I've found so far!<br /><br />http://geologycafe.com/rocks/serpentinite.html<br /><br />But what does it mean? are serpentinite and harzburgite related somehow?<br /><br />cheers, HollisHollishttps://www.blogger.com/profile/10788942181934895493noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-67282361551484724812013-02-04T14:10:07.101-07:002013-02-04T14:10:07.101-07:00Given location, density, and appearance, it looks ...Given location, density, and appearance, it looks like some kind of tectonized (tectonically shattered/brecciated) ultramafic rock. In particular, it looks like some harzburgite outcrops I've seen in the Josephine Ophiolite, along the Smith River in northern CA. http://en.wikipedia.org/wiki/HarzburgiteLockwoodhttps://www.blogger.com/profile/05960762797349483760noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-8311103467130212872013-02-04T10:32:46.540-07:002013-02-04T10:32:46.540-07:00Thanks, Tim. What a neat site, I didn't know ...Thanks, Tim. What a neat site, I didn't know about it! I will give it a try.Hollishttps://www.blogger.com/profile/10788942181934895493noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-54690916171893613142013-02-04T10:01:13.211-07:002013-02-04T10:01:13.211-07:00A really interesting post, Hollis. I really liked ...A really interesting post, Hollis. I really liked how you investigated it. I've found the people over at geologyrocks helpful for rock ID in the past. :)Timhttps://www.blogger.com/profile/06363592883349241096noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-57031111496430963812013-02-04T09:18:03.695-07:002013-02-04T09:18:03.695-07:00Hi Siim -- your posts are helpful, glad to have th...Hi Siim -- your posts are helpful, glad to have them. And thanks for the comment re serpentinite.Hollishttps://www.blogger.com/profile/10788942181934895493noreply@blogger.comtag:blogger.com,1999:blog-5192250381057989170.post-54511055755432590232013-02-04T08:59:25.532-07:002013-02-04T08:59:25.532-07:00I believe it is serpentinite. I've seen very s...I believe it is serpentinite. I've seen very similar rocks in Scotland. <br /><br />It is a nice surprise that you are linking to my posts. Thanks!Siimhttps://www.blogger.com/profile/02292495871766274301noreply@blogger.com