|Google Earth image of the area (north to the right).|
|Crude map of the dikes.|
Across the canyon farther to the south (left edge of the image), a thin bed of quartzite is shown in blue running along one edge of a dike. I'm not really sure that the bed correlates directly with what looks like another thin quartzite bed directly across the canyon from it to the north (right). Also along that southern edge, a single turquoise line marks the east extent of another dike area. I'm not really sure what is going on between that line and the blue quartzite line, but those rocks look more like sediments or quartzite than dike rock in Google Earth.
What might not be clear from the image is that at least one, and maybe two or more, intermediate to mafic dikes of unknown age cut across the switchbacked road east of the rhyolite porphyry dikes of presumed Tertiary age.
|What appear to be pieces of intermediate to mafic dike rock, with associated greenish outcrop in the road just behind my hand.|
|Google Earth image with approximate trace of one intermediate or mafic dike added in bright green.|
|Google Earth image showing approximate areas of rhyolite porphyry dikes hachured in bright turquoise.|