| Established | June 14, 1995 |
| Activated | June 14, 1995 |
| Director | dr.phil. Martin Ghisler |
| Budget (2005) | 133 million DKK |
| Homepage | www.geus.dk |
| Employees | ~300 Staff and researchers |
GEUS is an abbreviation for Danmarks og Grønlands Geologiske Undersøgelse, the Danish name for the independent sector research institute under the Ministry of the Environment. The English name of this institute is Geological Survey of Denmark and Greenland, an advisory, research and survey institute in hydrogeology, geophysics, geochemistry, stratigraphy, glaciology, ore geology, marine geology, mineralogy, climatology, environmental history, air photo interpenetration, geothermic energy fields concerning Denmark and Greenland.
GEUS works in close corporation with Geologisk Institut and Geologisk Museum, both part of University of Copenhagen.
It publishes a service paper called Greenland Hydrocarbon Exploration Information Service (GHEXIS) and a newsletter called Greenland Mineral Exploration Newsletter (MINEX) in co-operation with the Bureau of Minerals and Petroleum (Råstofdirektoratet), a secretariat for the Joint Committee on Mineral Resources under Greenland’s home rule.
In 1888, "Danmarks Geologiske Undersøgelse" was created.
In 1946, "Grønlands Geologiske Undersøgelse" was created.
On June 14, 1965, law no. 238 created GGU.
On December 23, 1987, law no. 864 merged GGU into DGU, changing its name to DGGU (Danmarks og Grønlands Geologiske Undersøgelse).
On June 14, 1995, Law no. 408 disbanded law no. 238.
On December 20, 1995, law no. 1076 concerning Danish sector research institutes created GEUS by merging DGU and GGU.