SilviaHysomidn
Answered

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where did scientists initially get information to develop the geologic time scale

Sagot :

The basic principals of Uniformitarianism were enough to give geologists a sequencial history of the earth but absolute dating using isotope data from igneous rocks gathered using several different techniques (strontium/rubidium, parent/daughter isotope decay rates) and with the combination of these two geologists were able to develop the geological time scale.
Toledoruth017idn

They studied rock layers and index fossils around the world

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