Potassium-argon dating of samples from the East Tintic district, Utah, indicate a 15 m.y. period of volcanism and intrusion. This period commenced in mid-Oligocene time and continued into the Miocene. Mineralization apparently occurred within a short time span.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page of Age of some Tertiary igneous rocks from the East Tintic District, Utah
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.