Discretion dating over 40s
The abundance of Ar is unlikely to provide the age of intrusions of granite as the age typically reflects the time when a mineral cooled through its closure temperature.However, in a metamorphic rock that has not exceeded its closure temperature the age likely dates the crystallization of the mineral.This technique allows the errors involved in K-Ar dating to be checked.Argon–argon dating has the advantage of not requiring determinations of potassium.One problem with argon-argon dating has been a slight discrepancy with other methods of dating.) reports that a correction of 0.65% is needed.Thus the Cretaceous–Paleogene extinction (when the dinosaurs died out) - previously dated at 65.0 or 65.5 million years ago - is more accurately dated to 66.0 Ma.Thus, discretion and interpretation of age dating is essential.
Please be careful when you choose to meet people this way!
They range from the banal (sports and such), to the geeky (things like computers, Monty Python), to the philosophical and political (is it okay for people to steal to feed themselves if starving? I like their presentation, their classification system, and the general feel of the place, but most of the people I've gotten much of a connection with are, sadly, far away. Internet Dating Continued on Next Page See Next Page for Places in Huntsville to Meet Singles More Articles Tickle Social Network Comment from a user: My friends and I have found a lot of success with Tickle, a pay site for all but the simplest of things (browsing, but no "True Match" test compatibility, email, or other contact methods).
It's probably got more of an older crowd, edging into the 30s, 40s, and even older in some cases.
Similarly, the Permian-Triassic extinction is now dated at 252.5 Ma, which is effectively coincident with the age determined by other means for Siberian Traps basalt flows.
Although I'm old and married, I get a lot of emails asking me where all the singles in Huntsville are.