Using the data in this table, determine the age in years of the granite (unit G on this table).

Question

Quizplus · Accepted Answer

The granite (unit G) is part of the Precambrian era, which is estimated to have occurred between 4.6 billion and 541 million years ago. Since the granite is not part of the Archaean era (which ended about 2.5 billion years ago) or the Proterozoic era (which ended about 541 million years ago), the only reasonable choice is E, which corresponds to 1.5 billion years.

Using the Data in This Table, Determine the Age in Years