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Day 272 : Porphyritic rhyolite from the Ordovician Tramore Volcanic Group, Lady Cove, County Waterford, Ireland.  Keele collection

Day 271 : Probably an interesting case of misidentification. I found this in the fine-grained acid igneous part of the Keele collection with the label "fragment filled felsite, Wooley". However, it looks clastic sedimentary rather than igneous. Checking the gazetteer and Geology Roam from the BGS, the only Wooley in the …

Day 270 : Spherulitic rhyolite from the Clogher Head Volcanics, Dingle Peninsula, Ireland. Keele Collection.

Day 269 : This is Alton Stone aka Hollington Fm aka Lower Keuper Sandstone aka Bromsgrove Sandstone Fm.  Who says British stratigraphy isn't confusing? This exposure is from the top of Toot Hill, opposite Alton Towers, Staffordshire. The white spots are barite crystals. 

Day 268 : A porphyritic rhyolite from Garregelldrem, near Garreg, Beddgelert, Wales. Keele collection.

Day 267 : A quartz porphyry from Toremore (Torr Righ Mòr) near Blackwaterfoot, Arran, Scotland.  Keele collection.

Day 266 : A dacite from the Central Complex of Arran, Scotland. Keele collection.

Day 265 : The Precambrian Peldar Porphyritic Dacite from Charnwood Forest, Leicestershire, England. Keele collection.

Day 264 : Another meeting in at London, this time at the Geological Society. On the way in from Bankside I grabed this iPhone shot of the granite facing of Ludgate House on Blackfriars Road.

Day 263 : Down in London for a meeting at the Royal Astronomical Society so have to resort to the iPhone.  Here is a nice phenocrystic granite from the front of a jeweler's shop at the Piccadilly end of Old Bond Street.