Areal Geology, Maps and Charts

Separately published geological maps, geological maps with explanatory texts, separately published geological charts, methodology of geological mapping
Related topics in other fields: Specific types of maps are found under the specific field, e.g. geomorphologic maps are found in 'Surficial geology, geomorphology'

General maps

Ask.com Maps. Aerial photographs
Geology.com - Satellite images
Google Earth
Google Maps
Wikimapia - including Wikimapia GeoTools: measure distance or route, measure land area, IP/WEB to geo location.
Mapping the Geology of the Planet with OneGeology - in Danish/English
ASTER Global Digital Elevation Model (GDEM) Free map covering 99 percent of the surface of the Earth.

Scandinavia

Nordisk Korthandel - scanmaps.dk

Denmark

By- og Landskabsstyrelsen: Landsdækkende kort over værdifulde geologiske områder - in Danish
Geus: digtial data & maps
North and North-East Greenland: 49 printed new geological maps on a scale of 1:250.000 from North and North-East Greenland are now available from GEUS: Greenland maps - GEUS. The topographical as well as the geological data can be found on an interactive map on GEUS' website: North and North-East Greenland.
Kortcenter.dk Digitale kort til GIS, planlægning, projektering, lednings- og kundeadministration, informationsystemer, ruteoptimering, internet m.m. - in Danish

Norway

geoNorge
Statens Kartverk

Sweden

Lantmäteriets kortbutik

Europe

IGME, Spain

US

Geology.com - US maps and World maps
GOS Geodata.gov: US maps and geodata
Omnimap.com: US maps and World maps. Search for area
USGS Earth Explorer
USGS maps, imagery and publications