Residential Excursion Programme

Raasay, Inner Hebrides; April 27 – April 30 2018

Leader: Dr Brian Bell

Field days: Friday (afternoon)/Saturday/Sunday/Monday (morning)

The island of Raasay comprises a wide range of well-exposed rocks within the Hebridean Terrane, ranging from Archaean gneisses of the Lewisian Complex and the unconformably overlying Proterozoic clastic sedimentary rocks of the so-called Torridonian Supergroup, through to glacial deposits of the Pleistocene Epoch. Mesozoic strata include various continental clastic sedimentary rocks, overlain by marine and estuarine deposits of the Lower and Middle Jurassic Period, including the Raasay Ironstone Formation. Palaeogene igneous activity resulted in both intrusive and extrusive units – lavas and granite. Pleistocene glacial activity produced diamictites and erratics, and striae on the harder rocks, while active landslips occur in the south-east of the island. This excursion aims to examine the entire range of rocks, and the industrial archaeology of the Raasay ironstone mine will also be addressed.

This trip is now fully booked. However, there is a waiting list. If you are interested please contact the Residential Excursions Secretary, Maggie Donnelly, at restrips@gsocg.org.

 

The Geology of Aberdeenshire – mountains, glens and coast; September 14 - September 17 2018

Leader: Dr Con Gillen

Field days: Friday (afternoon)/Saturday/Sunday/Monday (morning)

Overview

Devonian lavas and sedimentary rocks; Highland Border Complex (with superb pillow lavas); Highland Boundary Fault; ORS/Dalradian unconformity; Dalradian structure and metamorphism; Caledonian and post-Caledonian granites, gabbros, migmatites, dykes and breccia pipes.

Itineraries

Friday 14: half-day – Crawton (4 miles south of Stonehaven, on the A92, lunchtime); ORS (lavas and sediments); (Glasgow-Crawton 130 miles, 2.5 hours)

Saturday 15: full-day - Dunnottar Castle to Stonehaven - ORS/HBC/HBF/Dal

Sunday 16: full-day - Aberdeen area - granites, younger basics, migmatite, breccia, Dalradian

Monday 17: half-day - Ballater to Braemar - Grampian Group Dalradian, granites, skarns, glacial scenery. Return to Glasgow after lunch (100 miles, 2.5 hours)

Exposures are fairly easily accessible, with some longer flat walks and some ascents. Walking will be fairly easy on paths, but shore sections and grassy hill slopes could be wet and slippery. Good boots essential; and warm clothes, waterproofs etc., as usual. The two full days will be quite long, departing 9am, return 6pm.  Packed lunches required on all days. We will probably need to rationalise car use on the Sat/Sun. Our leader will provide grid refs for each day in case people are travelling from different places, and will have notes and maps. Basically, though, the excursions are from the Aberdeen guide (Trewin, Kneller, Gillen, 1987) – now out of print but available online via the Aberdeen Geological Society. However, we hope to have copies of the relevant excursions.  

Accommodation will be in B & B and travel in shared cars.

For more details please email the Residential Excursions Secretary, Maggie Donnelly, at restrips@gsocg.org.

More information about the Highland Boundary Fault at Stonehaven can be found here.