A rélative aboundance of oxygen 18 in a sedimentary rocks formed in marine environment indicates that: O The rock was ol

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A rélative aboundance of oxygen 18 in a sedimentary rocks formedin marine environment indicates that:
O The rock was older because contains more oxygen 18 than 16
O None of these choices is correct
O it formed during a glaciation
O it formed during a warm period
How do we know that Earth/solar system is 4.5 billion year oldby using U-Pb parent daughter pair?
O The oldest meteorites have an equal amount of parent-daughterU-Pb parent daughter
O There is no more Uranium left in the meteorites, all has beentransformed in Lead (Pb)
O the oldest meteorites have half of the radioactive Uraniumfound on Earth rocks.
O 4.5 by year is the age of the oldest rocks found on Earth