Science, Volume 323, Issues 5917-5922American Association for the Advancement of Science, 2009 |
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Page 1018
... zircon ages match the seafloor spreading ages , they find no anomalous old ages . At first glance , the results appear to contrast with the earlier studies sug- gesting that there may be different styles of gab- broic emplacement ( see ...
... zircon ages match the seafloor spreading ages , they find no anomalous old ages . At first glance , the results appear to contrast with the earlier studies sug- gesting that there may be different styles of gab- broic emplacement ( see ...
Page 1048
... zircon date range of 90,000 to 235,000 years , which is interpreted to reflect the time scale of zircon crystallization in oceanic plutonic rocks . N early two - thirds of Earth's crust is formed at mid - ocean ridges . Crustal growth ...
... zircon date range of 90,000 to 235,000 years , which is interpreted to reflect the time scale of zircon crystallization in oceanic plutonic rocks . N early two - thirds of Earth's crust is formed at mid - ocean ridges . Crustal growth ...
Page 1049
... zircon grains of each of the samples define a half - spreading rate of 15.8 ± 1.6 mm / year ( Fig . 3 ) , in agreement with the rate of 16.1 mm / year predicted by plate motion models ( 5 ) . Each sample has single - grain zircon dates ...
... zircon grains of each of the samples define a half - spreading rate of 15.8 ± 1.6 mm / year ( Fig . 3 ) , in agreement with the rate of 16.1 mm / year predicted by plate motion models ( 5 ) . Each sample has single - grain zircon dates ...
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