Year 1 Geology and Physical Geographers on a weekend in Snowdonia 2012

Over the weekend of 20-21st October Year 1 students from the School of Environmental Sciences set off for some autumn fun and relaxation in the mountains of Snowdonia, a parallel trip to the Trawsfynedd weekend taken by Geography, Ocean Science and Ecology students. A happy bunch of Year 1 Geology and Physical Geography (GPG) students, along with fellow year 1 students on other Geology and Geophysics

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degrees and ~9 lecturers to spent two days gallivanting around Cwm Idwal and for some another large hole in the ground (quarry).  Cwm Idwal, a large amphitheatre calved by erosion by ice during the repeated glaciations of the last 2 million years was at its stunning best in the autumn sunshine.

On Saturday after an early start from Liverpool we all congregated at the Llyn Ogwen car park at the foot of the Carneddau and Glyderau mountain ranges. From there Pete Kokelaar led a magical mystery tour through the turbulent volcanic history displayed in the rock record. The geology shows the deposition of huge pyroclastic flows from volcanic eruptions into a marine basin ~450 million years ago, and these strata have been deformed into a large syncline in subsequent mountain building. Outcrop after outcrop were crawled over from the head of the Nant Ffrancon to the foot of the Idwal Slabs. Overnighting in Caernarvon with a good meal, some pretty good beers, vividly colored and tasting shots courtesy of the students (thanks I think…), views of many members of the local constabulary and UK Borders Agency, and some bizarre speckley green-red glitter-ball lighting effects in the chosen hostelry playing havoc with Alan Boyle’s attention span later, a good night’s rest was had by some……

On Sunday the GPG students gained their first immersion into the wonderful world of glacial geomorphology and coring of lake sediments to reconstruct past environments with Rich Chiverrell and Jim Marshall. After a quick introduction to the broad landscape components, the skills of triangulation and geomorphological mapping were introduced, before 2-3 hours of mapping the retreat moraines of the last glaciation to have affect Cwm Idwal 12,600-11,500 years ago. The afternoon saw a switch of focus to the ‘very wet’ marsh surrounding the lake, where a sediment sampler was used to recover ~4 metres of lake deposits. These muds for the upper layers comprise peat and organic lake mud, but quickly give way to blue-grey gritty silts lain down as this last glacier declined and vanished 11,500 years ago.

Physical Geography and Geology interwoven and combined with fantastic weather, great views and some of the finest scenery in the UK; is there a better way to start your degree?

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