UM-Bot Posted January 23, 2018 #1 Share Posted January 23, 2018 Scientists have identified an area of Australia that broke away from North America 1.7 billion years ago. https://www.unexplained-mysteries.com/news/315093/chunk-of-north-america-is-part-of-australia 7 Link to comment Share on other sites More sharing options...
Noxasa Posted January 23, 2018 #2 Share Posted January 23, 2018 From the description, shouldn't it be the other way around...that a chunk of Australia is part of North America...namely, Canada? Link to comment Share on other sites More sharing options...
Piney Posted January 23, 2018 #3 Share Posted January 23, 2018 (edited) The Appalachians and Atlas Mountains share the same origins. They are basically 2 halves of the same range (disproving a certain lost continent in the Atlantic). The UK and the East Coast of North America also "share geology" (disproving self same theory). Edited January 23, 2018 by Piney 3 Link to comment Share on other sites More sharing options...
godnodog Posted January 23, 2018 #4 Share Posted January 23, 2018 Smart land 1 Link to comment Share on other sites More sharing options...
Sundew Posted January 23, 2018 #5 Share Posted January 23, 2018 Well that explains the possums..... 1 Link to comment Share on other sites More sharing options...
Unfortunately Posted January 24, 2018 #6 Share Posted January 24, 2018 Hah! Take that North America! *Begins chanting like a bogan* AUSSIE! AUSSIE! AUSSIE!! No? ...I'll just show myself the door. 3 Link to comment Share on other sites More sharing options...
Aardvark-DK Posted January 24, 2018 #7 Share Posted January 24, 2018 So, can't Trump just rule that part, and let others rule the big part ? Link to comment Share on other sites More sharing options...
Piney Posted January 24, 2018 #8 Share Posted January 24, 2018 21 hours ago, Sundew said: Well that explains the possums..... They crossed Antarctica and through South America, which was all marsupial until it connected to North America. 3 Link to comment Share on other sites More sharing options...
Carnoferox Posted January 24, 2018 #9 Share Posted January 24, 2018 20 minutes ago, Piney said: They crossed Antarctica and through South America, which was all marsupial until it connected to North America. Believe it or not, platypuses took the same route into South America. https://en.wikipedia.org/wiki/Obdurodon#Monotrematum_sudamericanum 3 Link to comment Share on other sites More sharing options...
paperdyer Posted January 24, 2018 #10 Share Posted January 24, 2018 Interesting. Wasn't Australia originally thought to be from Antarctica like India. Do all the Aussies have to start saying EAH? at the end of every sentence now? Link to comment Share on other sites More sharing options...
oldrover Posted January 24, 2018 #11 Share Posted January 24, 2018 2 hours ago, Piney said: They crossed Antarctica and through South America, which was all marsupial until it connected to North America. ****PEDANT ALERT**** Not quite, there were Eutherians in South America before the formation of the Panama isthmus. Although I did used to (1990's style) understand the where and when quite well, as Carnoferox has patiently pointed out many times, my knowledge outside of one species is now badly out of date. So I won't expand. But yes to all the rest of your post. 3 Link to comment Share on other sites More sharing options...
Piney Posted January 24, 2018 #12 Share Posted January 24, 2018 21 minutes ago, oldrover said: ****PEDANT ALERT**** Not quite, there were Eutherians in South America before the formation of the Panama isthmus. Although I did used to (1990's style) understand the where and when quite well, as Carnoferox has patiently pointed out many times, my knowledge outside of one species is now badly out of date. So I won't expand. But yes to all the rest of your post. It's really out of my archaeology sphere but I tried. 2 Link to comment Share on other sites More sharing options...
Carnoferox Posted January 24, 2018 #13 Share Posted January 24, 2018 (edited) 1 hour ago, oldrover said: ****PEDANT ALERT**** Not quite, there were Eutherians in South America before the formation of the Panama isthmus. Although I did used to (1990's style) understand the where and when quite well, as Carnoferox has patiently pointed out many times, my knowledge outside of one species is now badly out of date. So I won't expand. But yes to all the rest of your post. South America actually had a lot of native eutherians before the Isthmus of Panama formed sometime in the middle to late Miocene, including New World monkeys and xenarthrans like armadillos, sloths, and anteaters, as well as endemic extinct groups like notoungulates (i.e. Toxodon) and litopterns (i.e. Macrauchenia). Edited January 24, 2018 by Carnoferox 2 Link to comment Share on other sites More sharing options...
Doc Socks Junior Posted January 25, 2018 #14 Share Posted January 25, 2018 7 hours ago, paperdyer said: Interesting. Wasn't Australia originally thought to be from Antarctica like India. Do all the Aussies have to start saying EAH? at the end of every sentence now? Antarctica, Australia, and India were all close friends in Gondwana - but Gondwana formation didn't finish until early Cambrian, say 520 Myr ago. 1700 Myr ago is over 3 times longer than that! That's when Columbia was supposedly coming together. Then Rodinia, then Gondwana (not technically a supercontinent but quite an amalgamation), then Pangea (which included Gondwana). The basement of Precambrian geology is incredibly deep. "No vestige of a beginning, no prospect of an end" and all that. All that being said - this should really be in the Earth Science forum. 1 Link to comment Share on other sites More sharing options...
oldrover Posted January 25, 2018 #15 Share Posted January 25, 2018 19 hours ago, Carnoferox said: South America actually had a lot of native eutherians before the Isthmus of Panama formed sometime in the middle to late Miocene, including New World monkeys and xenarthrans like armadillos, sloths, and anteaters, as well as endemic extinct groups like notoungulates (i.e. Toxodon) and litopterns (i.e. Macrauchenia). Macrauchenia, I remember buying a little plastic model of one of these when I sas very young, the first time I realised there were cooler things than dinosaurs. By chance I watched a very informative (but annoyingly delivered) lecture today by Thomas Holtz. In which he said that DNA had been extracted from both Toxodon and Macrauchenia, and they were both closer to each other than anything else, and outside of which were most closely akin to the Perissodactyls. 1 Link to comment Share on other sites More sharing options...
Carnoferox Posted January 25, 2018 #16 Share Posted January 25, 2018 (edited) 1 hour ago, oldrover said: Macrauchenia, I remember buying a little plastic model of one of these when I sas very young, the first time I realised there were cooler things than dinosaurs. By chance I watched a very informative (but annoyingly delivered) lecture today by Thomas Holtz. In which he said that DNA had been extracted from both Toxodon and Macrauchenia, and they were both closer to each other than anything else, and outside of which were most closely akin to the Perissodactyls. According to the paper (first link) DNA was only successfully recovered from Macrauchenia. Its close relationship to Toxodon was confirmed based on earlier protein analyses (second link). I'm surprised that Holtz was giving the lecture considering he specializes in dinosaurs. https://www.nature.com/articles/ncomms15951 https://www.nature.com/articles/nature14249 Edited January 25, 2018 by Carnoferox 1 Link to comment Share on other sites More sharing options...
oldrover Posted January 25, 2018 #17 Share Posted January 25, 2018 2 hours ago, Carnoferox said: I'm surprised that Holtz was giving the lecture considering he specializes in dinosaurs. It was a run through only, but very interesting and included several groups I'd not previously heard of. As I say though, the humour grated a bit, as did the audience participation. 1 Link to comment Share on other sites More sharing options...
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