What is one characteristic of Archean rocks?

Question

Quizplus · Accepted Answer

One characteristic of Archean rocks is the presence of the earliest fossils of life on Earth, dating back to around 3.5 billion years ago. These fossils are found within stromatolites, layered structures formed by cyanobacteria, providing evidence of the existence of life on Earth during this time period. Paleomagnetism is not unique to Archean rocks and can be found in rocks from many different time periods. Numerous outcrops and diverse fossil content are also not specific to Archean rocks. Medicinal properties may be present in some rocks, but this is not a defining characteristic of Archean rocks.

What Is One Characteristic of Archean Rocks