Photogeological interpretation of Inglefield Land, North-West Greenland

Inglefield Land consists of a Middle Proterozoic crystalline basement with outliers of Upper Proterozoic and Lower Palaeozoic platform cover. Vertical aerial photographs at 1:150 000 with limited ground control have been used to distinguish gneisses, marble-rich metasediments, and basic and granitoid rocks in the basement. In the sedimentary cover a lower clastic unit and three succeeding carbonate units are recognised and can be correlated with previously known stratigraphy.

In the basement two gneiss complexes are separated by a belt of granitoid rocks and are deformed by three sets of major folds. A basement flexure causes a local angular unconformity in central Inglefield Land near the boundary between the Early and Middle Cambrian strata.

Many circular 20-250 m wide structures of post-Cambrian age, which may be volcanic pipes or surficial structures, occur along a WNW-ESE trending lineament cutting crystalline basement rocks in central Inglefield Land.