The oldest eon of geologic time is the?

Question

a. archean

b. proterozoic

c. paleozoic

d. phanerozoic

the divisions of the geologic timetable are based upon

a. fossil evidence

b. rock thicknees

c. radioactive decay

d. rock formations

the lack of precambrian index fossils is the primary reason that

a. precambrian time includes so many billions of years

b. the paleozoic eon starts at the end of precambrian time.

c. precambrian rock correlation is difficult.

d. most of canada is currently rising.

Answer 1

The oldest eon of geological time is the (a.) archaean.

The divisions of the geologic timetable are based upon (d.) rock formations.

The lack of precambrian index fossils is the primary reason that (c.) Precambrian rock correlation is difficult.