While the Indo-EurasianLaurentia tectonic analogy is incomplete, it is sufficiently compelling in explaining the electromagnetic and other data that it is a useful basis for understanding the Proterozoic assembly of Laurentia. Although carefully collected, accuracy cannot be guaranteed. Differing provisions from the publisher's actual policy or licence agreement may be applicable.
The potassium-argon (K-Ar) isotopic dating method is especially useful for determining the age of lavas.
This work was done in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the Department of Geology, University of Chicago.
Potassium-Argon Dating Potassium-Argon dating is the only viable technique for dating very old archaeological materials.
Any alteration or fracturing means that the potassium or the argon or both have been disturbed.