This Figure Shows the Main Subdivisions of the Geologic Timescale

Q53: The oldest known rock found on Earth

Q54: Which of the following is NOT a

Q55: What kind of geologic feature is shown

Q56: This figure shows the geologic timescale. Which

Q57: From this cross section of the Grand

Q59: What defines the boundaries between each of

Q60: Using the data in this table, determine

Q61: Which of the four numbered features on

Q62: Which of the numbered units is the

Q63: Which is the last step in formation