HDK Posted August 11, 2016 Share Posted August 11, 2016 Hi, I have a nice group of spherical stromatolites joined together. Since these are around since a couple of billion years and still exist today, is there a good way to date them (or at least get a rough estimation)? Scale on the photo is in cm. Thanks Hans Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 11, 2016 Share Posted August 11, 2016 Where were they found? Usually, you can figure out the age of the rock they were found in by location. Regards, Tim - VETERAN SHALE SPLITTER VFOTM - APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
HDK Posted August 11, 2016 Author Share Posted August 11, 2016 Tim, I do not know. Found them in a garage sale and were used as paper weight.... I was hoping that the form/colour might give an indication ? Early cambrian ? Hans Link to comment Share on other sites More sharing options...
Raggedy Man Posted August 11, 2016 Share Posted August 11, 2016 Looks like it's from Morocco. I have a similar one. My stromatolite is from the lower cretaceous, Tagana Formation. Kem-Kem region. Ksar-es Souk, Morocco. I'm not saying that's where yours is from, but it should help you out. Best regards, Paul ...I'm back. Link to comment Share on other sites More sharing options...
doushantuo Posted August 11, 2016 Share Posted August 11, 2016 Not on simple morphological grounds per se,but there are ways. First of all :the Russians(e.g. Semikhatov) and Indians(think Vindhyan Supergroup stromatolites) are believers in the use of stromatolites in Proterozoic stratigraphy. http://homepages.gac.edu/~rshapiro/PDF/morphostrat.pdf Link to comment Share on other sites More sharing options...
Ridgehiker Posted August 11, 2016 Share Posted August 11, 2016 Hi, I have a nice group of spherical stromatolites joined together. Since these are around since a couple of billion years and still exist today, is there a good way to date them (or at least get a rough estimation)? Scale on the photo is in cm. Thanks Hans No, no means. I've been in a lab with 3 doctor emeritus palozoic paleontologists trying to get info on a stromatalite. The conclusion?...its fossilized so must be old. Raggedy man recognizes the macro look of this specimen so that's as good an identification as possible without detailed info where it was found. Its a nice specimen. Is it heavy for its size? Stromatolites often are silicified. Link to comment Share on other sites More sharing options...
abyssunder Posted August 12, 2016 Share Posted August 12, 2016 Looks like it's from Morocco. I have a similar one. My stromatolite is from the lower cretaceous, Tagana Formation. Kem-Kem region. Ksar-es Souk, Morocco. I'm not saying that's where yours is from, but it should help you out. Best regards, Paul I agree. Looks like that ones from Morocco. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
piranha Posted August 12, 2016 Share Posted August 12, 2016 Enrico Bonino has some interesting comments asserting these are not stromatolites: LINK Link to comment Share on other sites More sharing options...
BobWill Posted August 12, 2016 Share Posted August 12, 2016 If the provenance question Bonino asked last year was never answered I would be hesitant to label them even as "similar to stromatolites from Morocco" especially after seeing his cut and polished samples. Link to comment Share on other sites More sharing options...
HDK Posted August 12, 2016 Author Share Posted August 12, 2016 No, no means. I've been in a lab with 3 doctor emeritus palozoic paleontologists trying to get info on a stromatalite. The conclusion?...its fossilized so must be old. Raggedy man recognizes the macro look of this specimen so that's as good an identification as possible without detailed info where it was found. Its a nice specimen. Is it heavy for its size? Stromatolites often are silicified. Hi, It is indeed heavy : it wheighs 3,5 kgs while the longest side is only 20 cm. Hans Link to comment Share on other sites More sharing options...
Carl Posted August 15, 2016 Share Posted August 15, 2016 Here's a particularly unhelpful photo taken in a WY rock shop this past July Link to comment Share on other sites More sharing options...
Missourian Posted August 15, 2016 Share Posted August 15, 2016 Here's a particularly unhelpful photo taken in a WY rock shop this past July Is that 8 billion in dog years? If so, that would place them in the Mesoproterozoic. Context is critical. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.