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Figure 3.

(A) Location of the Cerrito Colorado scoria cone and surrounding fault traces. (B) Rose diagram for the regional and local faults (lower hemisphere projection). (C) Dihedral angle diagram of the Oligocene-Miocene stress field agrees with N-S normal faults and tension fractures. (D) Dihedral angle diagram for the Miocene-present stress field agrees with E-W normal faults and tension fractures. Data computed using Win_Tensor 5.8.8 with kinematic fault slip data in the study area (see structural data in Table S1 [see text footnote 1]).

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