Vieja Group
Geology
Formations: unnamed (2), Colmena Tuff (1)
Lithologies: not reported (40), claystone (53), mudstone (16), "shale" (4), siltstone (28), sandstone (26), conglomerate (3), "limestone" (2), tuff (1)
Paleoenvironments: marine indet. (1), terrestrial indet. (76), carbonate indet. (2), platform/shelf-margin reef (2), marginal marine indet. (1), coastal indet. (1), transition zone/lower shoreface (1), fluvial indet. (45), lacustrine - large (3), lacustrine - small (1), lacustrine indet. (1)
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