When Was Greenstone Formed?

Large volumes of granite–greenstone crust, including that of both the Yilgarn craton of Western Australia and of the Superior craton of North America (section 2.4), were formed between 2760 and 2620 Ma.

How did the greenstone form?

Nature and formation

Greenstone belts have been interpreted as having formed at ancient oceanic spreading centers and island arc terranes. Greenstone belts are primarily formed of volcanic rocks, dominated by basalt, with minor sedimentary rocks inter-leaving the volcanic formations.

When were greenstone belts formed?

exposed along what are called greenstone belts. The basement of the Angaran platform was largely formed by about 1.5 billion years ago.