Using Fossils for Rock Ages Question: Fossil A is known to have lived from 100 to 80 million years ago and Fossil B is known to have lived from 85 to 50 million years ago.
(Fossil A; is known; ) (Fossil A; to have lived; T:from 100; T:80 million years ago) (Fossil B; is known; ) (Fossil B; to have lived; T:from 85)
Fossil A Fossil A Fossil B Fossil B
is known to have lived is known to have lived
T:from 100 T:80 million years ago
T:from 85