 The majority of the eruptions in this belt happened either 6 to 10 million years ago (Miocene) or 2–3 million years ago (Pliocene).However, there have been few eruptions in the Pleistocene.The Wells Gray-Clearwater volcanic field in south-eastern British Columbia consists of several small basaltic volcanoes and extensive lava flows that have been active for the past 3 million years.