Day 162 : A mylonite that has subsequently undergone cataclastic deformation. Granitic protolith. La Roche-Bernard, South Brittany, France. Keele Collection.

Day 161 : A protomylonite from a granitoid protolith. From the South Armorican Shear Zone, La Roche Bernard, Southern Brittany, France

Day 160 : Another mylonite, this time bearing the mineral fuchsite, a green variety of muscovite mica. From the Baie Vert Line, Newfoundland.  Keele Collection.

Day 159 : Folded ultramylonite from Norway. Keele Collection.

Day 156 : As i'm in a set of fault rocks at the moment, but have been out in the field, here is a fault in Aldwark Quarry in the Derbyshire Peak District.

Day 158 : A sheared and foliated K-feldspar megacrystic granite from Moulin de la Rive, near Locquirec, North Brittany. Keele Collection.

Day 157 : Folded ultramylonite from the Moine Thrust Zone south of Loch Eriboll.  Keele Collection.

Day 155 : Day five of fault rock week. This is the Ards Quartzite showing a strong lineation from partial mylonitisation in the Horn Head Slide, Horn Head, Donegal, Ireland. Keele collection.

Day 154 : A fault rock from Guernsey. A cataclasite of L’Enee Granodiorite, Fort Gray, Rocquanine Bay, Guernsey, Channel Islands. Keele collection.

Day 153 : The fault rock week of images continues with a tectonic breccia comprised of Cambrian quartzite from the classic Moine Thrust Zone, Assynt, Scotland. Keele collection.