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varve
(Encyclopedia) varve, in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-…conglomerate, in geology
(Encyclopedia) conglomerate, in geology, sedimentary rock composed largely of pebbles or other rounded particles whose diameter is larger than 2 mm (.08 in.). Essentially a cemented gravel,…Katla
(Encyclopedia) Katla, volcano, 4,961 ft (1,512 m) high, SW Iceland. One of Iceland's most active volcanoes, it is partly buried under the Mýrdalsjökull glacier, which covers its eruptive vents. Katla…Winnipegosis, Lake
(Encyclopedia) Winnipegosis, LakeWinnipegosis, Lakewĭnˌĭpəgōˈsĭs [key], 2,086 sq mi (5,403 sq km), 125 mi (201 km) long and 25 mi (40 km) wide, W Man., Canada. It is a remnant of glacial Lake Agassiz…Flathead Lake
(Encyclopedia) Flathead Lake, 197 sq mi (510 sq km), 30 mi (48 km) long, NW Mont.; largest natural lake in Montana. Formed by the glacial damming of the Flathead River, which flows through it from…period, in geologic time
(Encyclopedia) period, unit of time on the geologic timescale. Periods are shorter than an era and longer than an epoch. Periods are of variable length, generally lasting tens of millions of years,…Great Glen
(Encyclopedia) Great Glen or Glen More, valley, 60 mi (97 km) long, Highland, N central Scotland, extending from Moray Firth SW to Loch Linnhe. It was formed by a fault in the earth's surface. Loch…Logan, Mount
(Encyclopedia) Logan, Mount, 19,551 ft (5,959 m) high, in Kluane National Park, extreme SW Yukon, Canada, just E of Alaska; highest mountain in Canada and second highest in North America. One of the…Buckland, William
(Encyclopedia) Buckland, William, 1784–1856, English geologist. He was dean of Westminster from 1845. First to note in England the action of glacial ice on rocks, he did much to bring physical and…Bouvet Island
(Encyclopedia) Bouvet IslandBouvet Islandb&oomacr;vāˈ [key], uninhabited volcanic island, c.58 sq mi (150 sq km), S Atlantic Ocean, about 1,600 mi (2,576 km) SW of the Cape of Good Hope. A…Trending
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