Rock 366 : Day 36 : Igneous Contact
Day 36 : Mafic igneous intrusion into wet sediments. Note the irregular margin. Unknown locality, Keele collection.
Day 36 : Mafic igneous intrusion into wet sediments. Note the irregular margin. Unknown locality, Keele collection.
Day 35 : Fault breccia from near Carrara, Italy. Keele collection.
Day 34 : This is a cone-in-cone structure. The origin of these is somewhat mysterious, with the consensus appearing to be that they form during early diagenesis by expansive mineral growth. This is from the Triassic near Market Drayton, Shropshire. Keele collection.
Day 33 : Mylonite. Locality unknown. Keele collection.
Day 32 : This is the ‘pipe rock’ or more formally the Pipe Rock Member of the Lower Cambrian age Eriboll Formation. It is a quartz arenite with characteristic skolithos burrows. This sample comes from the western slopes of Cnoc Charornaidh, southeast of Loch Borralan, just beneath the Moine Thrust. …
Day 31 : This is a faulted pebble from the Kidderminster Formation (Bunter Pebble Beds as was). Siliceous cementation on the micro-faults keeps the pebble together. Unknown locality. Keele collection.
Day 30 : Folds and faults in an unknown sample. Slightly reminds me of a seismic reflection depth slice. Keele collection.
Day 29 : A sheared limestone conglomerate. Unknown locality. Keele Collection.
Day 28 : Gneissosity developed by deformation of granite. From the Lewisian near Gairloch, Scottish Highlands. Keele colloection.
Day 27 : Refolded folds. Superimposition of later open folds on earlier isoclinal folds in the Eilde Schists of Loch Leven, Scotland.