GSI publishes All Ireland bedrock map
The publishing of a 1:500,000 Bedrock Geological Map of Ireland in June 2006 marked an exciting milestone in the development of geological mapping in Ireland. The map is a comprehensive update of earlier such maps first published in 1928 and it displays a remarkable variety of bedrock across the island of Ireland. The map was the first produced on an agreed basis by the geological surveys of both parts of the island, the Geological Survey of Ireland (GSI) and the Geological Survey of Northern Ireland (GSNI). This achievement was recognised at its official launch in Derry on 26 June 2006 by Ms Maria Eagle, M.P., Minister for the Department of Industry, Trade and Investment, and Mr. Noel Dempsey T.D., Minister for Communications, Marine and Natural Resources.
The first all-island geological map was created in response to the need to provide guidance on ground conditions for railway developments back in the 1840s. Since then geological maps have been put to a wide variety of uses. They are invaluable guides to successful exploration for mineral deposits and energy resources such as oil, gas and coal. They form an early input in the planning of construction and infrastructure projects. They are critical components in identifying and protecting groundwater, which supplies more than 25% of our variable water supplies. In an increasingly discerning tourism market, these maps form the basis for products which interpret the landscape and its origins to the widest public. And they have guided our improved understanding of the plate tectonic forces that have shaped – and continue to shape – our continents and oceans since the formation of the Earth. Studies in a number of countries have indicated that the quantified benefits of geological mapping exceed their costs many times over, ranging up to 20-fold returns.
Just as ordnance survey maps become dated and less useful, with roads, housing and land use changing over time, so geological maps require regular revision as our understanding of the geology improves and new information is acquired from developments such as road cuttings and drilling. The map incorporates a considerable amount of new information extracted from the set of 21 regional sheets (1:100,000 scale) completed in the Republic recently and the regional map (1:250,000 scale) of the northern part of the island published by GSNI in 1997. The more detailed maps show point data such as outcrops and boreholes, allowing users to evaluate the accuracy of the geological data objectively, and they serve the needs of consulting engineers, planners, local authorities, and exploration, waste and water companies.
The map replaces the existing 1:750,000 scale map. It represents the most modern and detailed summary of the geology of the island that can be depicted at this scale. And at just €10 it represents very good value indeed. It can be purchased through GSI's Customer Centre at 01 678 2868 or online from here.
For additional information contact Andy Sleeman at 01 678 2862 or by e-mail.