tag:blogger.com,1999:blog-5859094080858570248.post742044644343903547..comments2024-03-29T13:05:30.522+05:30Comments on Rapid Uplift: Evolution of Crust, Climate and Life: Skeletal MineralogySuvrat Kherhttp://www.blogger.com/profile/18281172632784780810noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-5859094080858570248.post-34968886218785630742009-01-27T18:01:00.001+05:302009-01-27T18:01:00.001+05:30This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5859094080858570248.post-76545201617222431942009-01-27T18:01:00.000+05:302009-01-27T18:01:00.000+05:30This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5859094080858570248.post-82663641907504051342009-01-22T20:12:00.000+05:302009-01-22T20:12:00.000+05:30hypocentre- that change this study suggests affect...hypocentre- that change this study suggests affected groups that <I>newly </I> acquired the ability to secrete skeletons in calcite seas. so their skeletons were calcite. groups which already had aragonite armor persisted with that even when seawater chemistry changed. there is a strong conservation of skeletal mineralogy. <BR/><BR/>If the switch to calcite seas was accompanied by other changes such as increase in oxygen, then that might have affected metazoan evolution, such as favoring larger body size.<BR/><BR/>Michael- thanks, I will look up your post.Suvrat Kherhttps://www.blogger.com/profile/18281172632784780810noreply@blogger.comtag:blogger.com,1999:blog-5859094080858570248.post-21879551948612802542009-01-22T17:28:00.000+05:302009-01-22T17:28:00.000+05:30Suvrat - this is interesting stuff - and well-wort...Suvrat - this is interesting stuff - and well-worth a series. You're probably familiar with Hazen's work on inorganic and organic evolution that I highlighted in my December 1 post last year - it fits with, as you say, these fascinating big themes and interwoven causal chains. I look forward to more!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5859094080858570248.post-89341829910305969142009-01-22T05:24:00.000+05:302009-01-22T05:24:00.000+05:30This is something that I have been pondering recen...This is something that I have been pondering recently. The late Early Cambrian rocks of England and Wales certainly seem to suggest a strange sea water chemistry (at a time of the switch from aragonite to calcite). I was wondering how much this might influence skeletisation and evolution. (I am far from an expert in these areas)Anonymousnoreply@blogger.com