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After estimating the rate of this radioactive change, he calculated that the absolute ages of his specimens ranged from 410 million to 2.2 billion years. Wasserburg applied the mass spectrometer to the study of geochronology.Though his figures were too high by about 20 percent, their order of magnitude was enough to dispose of the short scale of geologic time proposed by Lord Kelvin. This device separates the different isotopes of the same element and can measure the variations in these isotopic abundances to within one part in 10,000.These minerals are common to many igneous and metamorphic rocks.

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Some users will use the private chat and messaging.

Others will like commenting on photos, posts or other members’ walls. You can follow furries, post to their public wall, like their posts and photos, send them a private message, or just a flirt—a kind of predefined message—to break the ice.

Ferzu is a place for anyone whose brain is wired furry. The newsfeeds provides a summary of what furries are writing on their walls and the comments others are making.

It doesn’t matter if you’re a new pup just dipping your toe in the water or a vet with your own fursuit, we hope you’ll find you belong here. You can customize your Global and Local Newsfeeds by setting your site-wide filter with basic criteria—from physical attributes like height, weight and body type to personal info like type of fursona and relationship status.

The idea is that the system will translate your location to geographical coordinates to calculate your relative distance to other furries.

This way you can see who's nearby, sorted by distance. If you're busy chatting with others and can't respond to a new message right away, that's fine!Bertram Boltwood suggested that lead is one of the disintegration products of uranium, in which case the older a uranium-bearing mineral the greater should be its proportional part of lead.Analyzing specimens whose relative geologic ages were known, Boltwood found that the ratio of lead to uranium did indeed increase with age.Also, by extrapolating backward in time to a situation when there was no lead that had been produced by radiogenic processes, a figure of about 4.6 billion years is obtained for the minimum age of the Earth.This figure is of the same order as ages obtained for certain meteorites and lunar rocks.On Ferzu you will find advanced search tools unlike any other furry site, to help you discover people in your area who share your interests, who have similar fursonas or have the same kinks as you.

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