Diagenetic Landscape - 3 image stitch
Iron minerals create a miniature mountainscape in a 6"x14" slab of sandstone
Iron-oxidizing microbes colonized the interface between siderite-cemented sand and porous sandstone.
Oxidation of iron along this interface produced acid that caused dissolution of siderite.
Quarried from the Shinarump Member of the Chinle Formation, Triassic, Kanab, Utah