Meteorite impact picture of the week

In the future we will present interesting pictures – megascopic to microscopic – from the world of our impact research in roughly weekly intervals. A small accompanying text explains the presentation and, where appropriate, links to further pages are given. New image (16.3. 2019):

Rock fluidization, Azuara Impact Structure (Spain)

Rock fluidization in strongly competent limestones/dolostones (Muschelkalk Fm.); Monforte de Moyuela, Azuara impact structure, Spain. See article Rock fluidization during peak-ring formation of large impact structures by U. Riller et al. Also focus on Acoustic fluidization (H.J. Melosh). Enlarged image.

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shock metamorphism in calcite planar features microtwinsShock 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. (7.9. 2019). Enlarge image!