De Geerdalen
De Geerdalen is a valley in Nordenskiöld Land at Spitsbergen, Svalbard. It is named after Swedish geologist and Arctic explorer Gerard De Geer. The mountain pass of Kreklingpasset divides De Geerdalen from Helvetiadalen. The river of De Geerelva flows through the valley, and debouches into Sassenfjorden at Elveneset.