Shock metamorphism in calcite

Shocked calcite

shocked calcite multiple sets of planar deformation features Rubielos de la Cérida impact

Shock effect in calcite. Multiple sets of closely spaced planar features (micro twins). The width of the twins is of the order of only one micrometer. Thin section micrograph, crossed polarizers. From a polymictic breccia, rim region of the Rubielos de la Cérida impact basin crater chain.