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Geosphere; February 2008; v. 4; no. 1; p. 75-106; DOI: 10.1130/GES00116.1
© Geological Society of America

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Figure 12. Geologic map of the southern caldera margin at Red Mountain (Wood Spring Canyon 7- $1/2$ ' quadrangle). East-dipping Caetano Tuff and interbedded mesobreccia lenses composed of Paleozoic clasts (Fig. 13A) are abruptly truncated against Paleozoic Valmy Formation at west-northwest–striking, steeply north-dipping caldera margin. Upper mesobreccia consists of interbedded lenses of Paleozoic clast debris-flow deposits and lithic-rich Caetano Tuff (Fig. 13B). The Red Mountain fault steps abruptly westward at and probably reactivates the caldera boundary fault.

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