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Outcrops along the Sierra Madre Oriental fold-and-thrust belt in northeast Mexico (Nuevo Leon State). Lower red hills on the right side of picture are Early-Middle Jurassic redbeds (rift stage) of La Joya Formation, which are overlain by white evaporite layers (transitional stage) of Early Oxfordian age (Minas Viejas Formation), and capped by marine gray limestones (drift stage) of Oxfordian Zuloaga Formation (Smackover Formation equivalent). Dips against hill. Photo by Claudio Bartolini.
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Outcrops along the Sierra Madre Oriental fold-and-thrust belt in northeast Mexico (Nuevo Leon State). Lower red hills on the right side of picture are Early-Middle Jurassic redbeds (rift stage) of La Joya Formation, which are overlain by white evaporite layers (transitional stage) of Early Oxfordian age (Minas Viejas Formation), and capped by marine gray limestones (drift stage) of Oxfordian Zuloaga Formation (Smackover Formation equivalent). Dips against hill. Photo by Claudio Bartolini.