Who we are

The GSNI is part of the Department for the Economy Northern Ireland (DfE). It is staffed by scientists of the British Geological Survey (BGS) under contract to DfE, which allows GSNI to call upon expertise from within other parts of the BGS. GSNI also advises other Northern Ireland government departments and liaises closely with the Geological Survey of Ireland (GSI).

What we do

The Geological Survey of Northern Ireland (GSNI) provides geoscience information and services to inform decision making.


GSNI holds an extensive archive of maps, boreholes and site investigation reports; detailed urban and regional geochemical and geophysical data, and publishes books, memoirs and reports.

Enquiry Service


GSNI maps, models and monitors the ground we live on. Our geological research underpins decision making, promotes economic development and generates baseline data for environmental management.

Karst Aquifers



Salt Mining

Giant's Causeway

Game of Thrones

Contact us

GSNI can be contacted by telephone on 028 9038 8462 or by email gsni@economy-ni.gov.uk

Visit the contact page for more information.

Published: 1st May 2011
Last Updated: 15th February 2024