Sydney Johnston
Sidney Johnston

Field Trip Coordinator

Sidney is an amateur geologist who likes to mix the intellectual and the outdoors. Sidney is responsible for the AGS field trips, which cover local and more remote Scottish geological sites.

Marcus Duffy - AGS Secretary
Marcus Duffy


PhD student at the University of Aberdeen studying the effects of Igneous intrusions on the petroleum system.

Professor Ken Glennie
Ken Glennie

Honorary President

Member of AGS since 1987. Main interests: Deserts, present & past, North Sea & Middle East (mainly Oman) geology.

Jeremy Preston


Jeremy runs his own web design company, Design@79, from home in York. Geological interests include the magmatism of the British Tertiary Igneous Province, the Appinite suite of NW Scotland and ‘hard rocks’ in general!

Hugh Morel


Having graduated in the 1970s I first worked as a hydrogeologist, but migrated to the oil industry, where I’ve worked mainly in the UK with a variety of oil companies. The AGS provides a welcome breath of fresh air as it covers a very wide range of topics in its lectures and field visits.

Don Stewart

Communications Officer

Originally an Electronics graduate from University of Edinburgh in 1972, I had the opportunity to pursue my other passion of Geology when I semi-retired from the subsea technology industry in 1996. I was encouraged to study for a geology degree at Aberdeen, as a (very!) mature student, and graduated with honours in 2003.

Alan Holmes


BSc Mech Eng Glasgow 1981, with a particular interest in engineering uses & properties of Scottish stone.