The best method to date volcanic ash layers is: potassium-argon uranium-lead car

Question

The best method to date volcanic ash layers is:

potassium-argon

uranium-lead

carbon-14

all of the above

The longest amount of time on geologic time scale is referred to as:

eons

epochs

periods

eras

The Principle of Original Horizontality states that:

rocks are older on the bottom

it yields relative ages of rocks.

rocks are layered and are laid down essentially horizontal

fossils must be in there correct order

During the radioactive decay process, the following can happen during the process:

a new element can form

less that 50% of the parent can decay to the daughter product

more than 50% of the parent isotope can decay

all of the above

potassium-argon

uranium-lead

carbon-14

all of the above

Explanation / Answer

For dating volcanic rocks and ash mostly potassium argon method is used

Eons are the oldest followed by era, period, epoch

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