The photograph shows ductile\u2013brittle shear fractures affecting banded and foliated quartzites (Rabassers quartzites), interlayered in a sequence attributed to Upper Proterozoic. The whole sequence was subjected to polyphase deformation and metamorphism during the Variscan. D3 dextral NW\u2013SE shearing caused simultaneous folding and stretching of the preexisting banding. Ductile folding contrasts with shear bands and microfaults arising from a brittle\u2013ductile extension. The ramp-flat-like geometry of the fault caused displacement gradients in the layers producing the reverse drag folds. PhotoID148<\/p>\n
Photograph: Jordi Carreras\/Elena Druguet<\/p>\n
Reference: Carreras and Druguet, in press. Photograph of the Month. Journal of Structural Geology<\/p>\n","modified":"2018-06-30T19:30:09","color":"","icon":"","noDetails":false,"noInteraction":false,"image":"https:\/\/outcropedia.tectask.org\/wp-content\/uploads\/2018\/06\/Rabassers-Shear-Bands-768x399.jpg","taxonomy":{"webmapp_category":[231]},"accessibility":{"mobility":{"check":false,"description":""},"hearing":{"check":false,"description":""},"vision":{"check":false,"description":""},"cognitive":{"check":false,"description":""},"food":{"check":false,"description":""}},"locale":"it","source":"https:\/\/outcropedia.tectask.org\/wp-json\/wp\/v2\/poi\/1331","wp_edit":"http:\/\/outcropedia.tectask.org\/wp-admin\/post.php?post=1331&action=edit","web":"https:\/\/outcropedia.tectask.org\/poi\/rabassers-shear-bands\/","addr:street":"","addr:housenumber":"","addr:postcode":"","addr:city":"","contact:phone":"","contact:email":"","opening_hours":"","capacity":""},"geometry":{"type":"Point","coordinates":[3.280883610248566,42.31594440960682]}}