Feeder dike system in northern foothills of the Reveille Range. (A) Detailed map of dike set (red) illustrating en echelon character. Dike widths are typically several decimeters but are ∼2 m at the widest locations. The dike system is hosted by volcaniclastic deposits. (B) Photograph showing parts of three en echelon segments (see field of view in A). Bushes in foreground are ∼30 cm in diameter.
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