Geology of South Donegal - Sheet 3
1:100,000 series index
Area covered by the Map and Booklet
THE BEDROCK GEOLOGY OF SOUTH DONEGAL
- INTRODUCTION TO THE GEOLOGY OF SOUTH DONEGAL
- Landscape and geology
- Some geological processes
- A brief geological history of Donegal
- Reading the geological map of South Donegal
- Mesoproterozoic or Neoproterozoic; Slishwood Division
- Neoproterozoic; Dalradian Supergroup
- Late Silurian and Early Devonian Magmatism; the Donegal Batholith
- Minor igneous intrusions
- Upper Palaeozoic sedimentary rocks
REFERENCES AND ADDITIONAL READING LIST
APPENDIX 1: Regional metamorphism of metabasites in the Lough Derg inlier
APPENDIX 2: Brief lithological descriptions of map units
- Metallic Mineral Deposits
- Industrial Minerals and Rocks
Two plates from the booklet
Plate 3. Clastic dykes interpreted as ice wedge casts deleoped in the upper surface of a
diamictite within the Port Askaig Formation (G 5888 8835, 220m on a bearing of 282° from Lougheraherk school)
at the locality figured by Howarth (1971), and Johnston (1993). Modest sized granite clasts are scattered within the diamictite. Diameter of coin is 31mm.
Photo by C. B.Long.
Plate 6. The Carboniferous basal conglomerate resting unconformably on the Termon Formation
at the western end of the Largymore outlier, near Shalwy. The cliff is approximately 8m high.
Photo by Conor MacDermot.