Informal ice hockey, or pond hockey
What is an alternative name for a hydrolaccolith, a mound of earth-covered ice found in the Arctic and subarctic that can reach up to 70 metres (230 ft) in height and up to 600 m (2,000 ft) in diameter?
The elfstedentocht, or 11 cities tour on ice, is held in Friesland in the north of the Netherlands at irregular gaps, though never more than once a year, and is anticipated by amateur and professional skaters alike. What determines when it is held?
The roughly circular deep depressions, typically found in shallow carbonate platforms, formed during past ice ages when the sea level was up to 100–120 m (330–390 ft) lower than at present are a favourite target of extreme divers. What are they called?
