Universities:

National University of Ireland Galway: Department of Earth and Ocean Sciences
Trinity College Dublin: Department of Geology
University College Cork: Geology homepage
University College Dublin: Department of Geology
University College Dublin: Geophysics Research Group
University of Ulster at Coleraine Geophysics Research Group

Geological Survey / Government Departments:

Department of Communication Energy and Natural Resources
Department of Enterprise, Trade and Investment - Northern Ireland
Environmental Protection Agency
Exploration and Mining Division - Department of Communication Energy and Natural Resources
Geological Survey of Ireland
Geological Survey of Northern Ireland
Minerals Ireland and Exploration and Mining Division

Geological Societies / Associations:

Cork Geological Association
Geophysical Association of Ireland
Irish Association for Quarternary Studies
Institute of Geologists of Ireland
Irish Geological Association
Irish National Information Server
Irish Research Scientists Association
Mine Heritage Society of Ireland
Royal Irish Academy

Universities:

Aberdeen University: Department of Geology and Petroleum Geology
Bristol University: Geology Department
Colorado School of Mines
Fault Analysis Group
Imperial College Earth Science and Engineering
Keele University
Manchester University: Department of Geology
Oxford University: Department of Earth Sciences
Stanford University: Department of Geology
University of Cambridge: Department of Earth Sciences
University of Durham: Department of Geology
University of Exeter: Camborne School of Mines
University of Leicester: Department of Geology
University of Liverpool: Department of Earth Sciences
University of Southampton
Yale University

Geological Surveys / Government Departments:

BGS - British Geological Survey
Czech Geological Survey - Cesky Geologicky Ustav - CGU
General Directorate of Mineral Research & Exploration - Turkey
Geological Survey of Canada
Geological Survey of Denmark and Greenland, GEUS
Geological Survey of Estonia
Geological Survey of Finland

Geological Survey of France
Geological Survey of Japan (GSJ)
Geological Survey of Lithuania
Geological Survey of Norway (NGU)
Geological Survey of Slovenia
Geological Survey of Sweden , SGU
United States Geological Survey

Geological Societies / Associations

AIPG Index
American Association of Petroleum Geologists
American Geological Institute
American Geophysical Union
Australasian Institute of Mining and Metallurgy (AusIMM)
Australian Geoscience Council (AGC)
Australian Minerals Foundation (AMF)
Australian Institute of Geoscientists (AIG)
Australian Society of Exploration Geophysicists (ASEG)
Dutch Geological Society (NGV)
EAGE - European Association of Geoscientists & Engineers
Energy Institute
EFG - European Federation of Geologists
Geological Association of Canada
Geological Society of America Home Page
Geological Society of Australia
Geological Society of Glasgow
Geological Society (London, UK)
Geological Society of New Zealand
Geological Society of Spain
Institution of Materials, Mining and Metallurgy
International Association of Hydrogeologists
International Union of Geological Sciences
Mineralogical Society
Natural Environment Research Council (UK)
PDAC - Home Page for Main Site
Petroleum Exploration Society Australia (PESA)
Petroleum Exploration Society of Great Britain
Royal Society London
Society of Economic Geologists
Society for Sedimentary Geology

Geography Network
INFO-MINE The Internet's Premier Mining Information Site
Minesite
Mining Plazza
Nature
New Scientist
Science Online
The Mining Journal Ltd
The World-Wide Web Virtual Library: Earth Sciences
Wiley Geography and Earth Science
Yahoo! Earth Sciences:Geology and Geophysics:Organizations

Alba Mineral Resources Plc
African Diamonds Plc
Anglo American
AngloGold Ashanti
Angus and Ross plc
Asarco
Barrick Gold Corporation
Belmore Resources Ltd
BHP Billiton
Boliden Tara Mines Ltd
Cambridge Mineral Resources Plc
Connemara Mining Company
Conroy Diamonds and Gold
El Nino Ventures Inc
Galantas Gold Corporation
Glencar Mining plc
Karelian Diamond Resources Plc
Kenmare Resources Plc
Lundin Mining Corporation Plc
Metallum Resources Ltd
Minco Plc
Minmet Plc
Moydow Mines International Inc
Newmont Mining Corporation
Ormonde Mining plc
Ovoca Gold Plc
Petroceltic International Plc
Rathdowney Resources Ltd
Rio Tinto
Teck
Xstrata plc
Yamana Gold Inc

Acme Analytical Laboratories
APEX Geoservices Ltd
Aurum Exploration Services
BMA Geoservices
Fugro Robertson
Geosoft Europe Ltd
Golder Associates
LiaMin Consulting
Minerex Ltd
Reid Geophysics
Scott Wilson
SGS Minerals Services
Snowden Group
Stewart Group Ltd
SLR Consulting Ltd
SRK Consulting
Wardell Armstrong
Wardrop