These columnar and panel sections show the Tertiary stratigraphy of central Arizona. In general, Tertiary deposits rest on older deposits from northeast to southwest across the region. Southwest of the Black Hills, Paleozoic rocks are absent and the Tertiary rests on Proterozoic rocks.
The Tertiary time-stratigraphic chart of Verde Valley and vicinity shows known and inferred age relations. The presumed correlation of conglomerates (gravels) is shown as are known clast compositions of the various units. Sedimentary deposits are known to be intercalated with basalts, but their distribution is poorly known.
