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Figure 5.
TIMS three-color composite for the entire scene, showing microcline in red, quartz in green,
and oligoclase in blue. Yellow indicates a nearly equal abundance of quartz and microcline,
whereas cyan is quartz plus oligoclase. Microcline, entering from the eastern fan of
the Providence Mountains, appears to transported over Cottonwood and Winston Wash and
incorporated into the active dunes (orange color). Oligoclase is being derived from the northern
and southern alluvial fans, and in addition, occurs to a lesser extent along the Mojave River
Wash-Kelso Dune transport path. The slight greenish coloration within the transport path
indicates that quartz is the dominant mineral, being transported from the west. Quartz and
microcline also appear to be being remobilized out of the Kelso Wash near the point where the
railroad tracks and the wash diverge. It is likely that these sands are being deposited into the
dunes by the prevailing easterly winds [Ramsey, et al., 1999].
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