Problems dating metamorphic rocks

21-Dec-2019 01:27 by 10 Comments

Problems dating metamorphic rocks - sex dating in oneida new york

This means that the laboratory testing was precise.

Among these volcanic layers are distinctive dark-coloured rocks called amphibolites3 (figure 3).

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The radioisotope methods, long touted as irrefutably dating the earth as countless millions of years old, have repeatedly failed to give reliable and meaningful absolute ages for Grand Canyon rocks.

Note that the error estimates (the ± numbers) are small compared with the age.

They are also small compared with the variation in ages between samples.

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Furthermore, the seven samples from the small amphibolite unit near Clear Creek, which should be even closer in age because they belong to the same metamorphosed basalt lava flow, yielded K-Ar model “ages” ranging from 1,060.4 ± 28 Ma to 2,574.2 ± 73 Ma (figure 6).

This includes two samples only 0.84 m (2 ft 9 in) apart that yielded K-Ar model “ages” of 1,205.3 ± 31 and 2,574.2 ± 73 Ma.

potassium-argon (K-Ar) “ages” calculated for each of the 27 amphibolite samples from Grand Canyon ranged from 405.1 ± 10 Ma (million years) to 2,574.2 ± 73 Ma.

That is a six-fold difference, for samples that should be of similar age.

Rafting through Grand Canyon, northern Arizona, is a most exhilarating and enjoyable experience.