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Which environment will produce rocks that are least reliable for radiometric age dating?
a.Igneous minerals crystallizing in a pluton.
b.Metamorphic mineralscrystallizing within a continent-continent collisional belt.
c.Sediment depositing in a deep basin far removed from a neighboring volcano.
d.Sediment depositing in a basin adjacent to active subduction zone, whereby the sediment is regularly layered with volcanic ash.
e.Layered lava flows on the flank of a volcano.
f.Hot-spot volcanos, like Yellowstone or Hawaii.

Respuesta :

Since metamorphic rocks have many parent rocks, radiometric dating cannot be used to determine their age. Metamorphic rocks are those that were created underground under intense heat and pressure.

Why is it challenging to calculate the age of a sedimentary rock?

When a detrital sedimentary rock is radiometrically dated, it only determines the age of one grain, which is likely to have originated from a different source than the other grains in the rock.

Which of the following is more effective for giving rocks a numerical age?

Geologists can calculate quantitative, numerical ages for geological materials including rocks, minerals, and fossils using radioactive isotope systems. Geologists examine the chemistry of a geologic material to determine its age by calculating the ratio between Atoms with a parent and a child.

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