tag:blogger.com,1999:blog-5517176012861550589.post1832902929949198974..comments2023-06-14T21:50:15.221+10:00Comments on Ediacaran: 3.4 Billion Year Old Microfossils? . . . Umm Yes (Probably)Chris Nedinhttp://www.blogger.com/profile/06978886926715669724noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-5517176012861550589.post-34633139051139078242011-09-03T10:15:51.193+10:002011-09-03T10:15:51.193+10:00CherryBombSim,
Well, this is a Palaeo blog so any...CherryBombSim,<br /><br />Well, this is a Palaeo blog so any fossils, even smashed up blobs, are a good thing!<br /><br />Regarding the sulphur isotope values. I didn't have time to go into it, but the significance is the same as for the carbon isotope values, namely that there is a significant disproportioning of the 'lighter' and 'heavier' sulphur isotopes over very small distances. This separation has been observed to occur inorganically, in oxidising magmatic fluids. However, since the rocks show no sign of this happening, the only viable alternative is that the dispropostionation is the result of the organic processes of sulphate reduction and disproportionation.Chris Nedinhttps://www.blogger.com/profile/06978886926715669724noreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-84017430201358092662011-08-29T22:32:23.664+10:002011-08-29T22:32:23.664+10:00I am so proud to be Australian when I read these s...I am so proud to be Australian when I read these sorts of finds, and so eager to get my degree, to go make some of my own!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-55775987245093612312011-08-29T15:07:21.650+10:002011-08-29T15:07:21.650+10:00I dunno whether deciding if particular smashed-up ...I dunno whether deciding if particular smashed-up blobs are cells or not advances us that much, but I guess people like photos they can point at. For me, the isotope data give a clearer picture of what is going on, and I appreciate you passing some of that along as I don't have access to the article. Oxygen isotopes seem like what I expect, but I'm not sure what to make of the S isotope ratios they report in the abstract. I'm not sure what to look for in S fractionation that far back in time.CherryBombSimhttps://www.blogger.com/profile/03328507559853649707noreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-21098902156632668872011-08-29T13:23:02.756+10:002011-08-29T13:23:02.756+10:00This is why I'm always excited when there is a...This is why I'm always excited when there is a new post here, particularly where there are different interpretations floating around. Your observations are always skeptical and clear. My background is in geology and chemistry and you write in a way that gives me the info I need without going so far that other folks might not be able to follow it. Gave me flashbacks though as my MS thesis looked at changes in sedimentary fracture fillings in a Silurian reef. ;) Good stuff!PopeCoyotehttps://www.blogger.com/profile/17154159903166747325noreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-53090848638682231602011-08-29T10:38:55.869+10:002011-08-29T10:38:55.869+10:00Very well written; Reading it was a joy.
You deser...Very well written; Reading it was a joy.<br />You deserved PZ's shoutout.Petr Kudláčekhttps://www.blogger.com/profile/13815604888905970321noreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-10486911416074841112011-08-29T10:19:31.959+10:002011-08-29T10:19:31.959+10:00It's RamAn spectroscopy. South Indians are kin...It's RamAn spectroscopy. South Indians are kinda sensitive about that.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-19482631726226412682011-08-29T04:12:55.890+10:002011-08-29T04:12:55.890+10:00Superb article. I love what you can figure out loo...Superb article. I love what you can figure out looking at ancient sand grains under a microscopeAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5517176012861550589.post-5529714094827023872011-08-29T02:34:18.351+10:002011-08-29T02:34:18.351+10:00I love this article! Great work!I love this article! Great work!Anonymousnoreply@blogger.com