In a section measured at Mogollon, Catron County, New Mexico, [Basin-and-Range province], detailed magnetic studies reveal a simple pattern: Cooney Formation and Whitewater Formation [author is referring to Whitewater Creek Member of Cooney Tuff] are older than the other units (citing Bikerman, 1972), and they are consistently reversely magnetized. They are overlain by Pacific Quartz Latite, which correlates approximately with Apache Spring Quartz Latite. Pacific Quartz Latite is very stable magnetically, but it has an unusual direction of magnetization, therefore it probably cooled rapidly during a time when the field was reversing. Both in its direction of magnetization and in its magnetic properties, Pacific bears a surprising similarity to Taylor Creek Rhyolite, but is distinctly older. Pacific underlies a sequence of basaltic andesite and rhyolite: Mineral Creek Andesite, Fanney flow-banded rhyolite [Fanney Rhyolite], and Last Chance Andesite are all normally magnetized. Magnetostratigraphic position of Taylor Creek unit within a preliminary model of the middle Tertiary paleomagnetic reversal pattern is depicted on fig. 4; Cooney, Whitewater, Apache Spring, Mineral Creek, Fanney, and Last Chance units depicted on fig. 5.

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).

Abandoned. Rocks reallocated to Davis Canyon, Shelley Peak, and Bloodgood Canyon Tuffs.

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).