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Riding Mountain National Park

(Encyclopedia) Riding Mountain National Park, 1,148 sq mi (2,973 sq km), SW Man., Canada, W of Lake Manitoba; est. 1929. A wooded region with small glacial lakes, on the highest part of the Manitoba…

Agassiz, Lake

(Encyclopedia) Agassiz, LakeAgassiz, Lakeăgˈəsē [key], glacial lake of the Pleistocene epoch, c.700 mi (1,130 km) long, 250 mi (400 km) wide, formed by the melting of the continental ice sheet…

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-…

Big Stone Lake

(Encyclopedia) Big Stone Lake, narrow lake, c.25 mi (40 km) long, on the Minn.–S.Dak. line. Located in the outlet channel of glacial Lake Agassiz, it is the source of the Minnesota River and serves…

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,…

Bogdanovich, Peter

(Encyclopedia) Bogdanovich, Peter, 1939 - 2021, American film director, actor, and critic, b. Kingston, N.Y. Bogdanovich was the son of Serbian…

Regency

(Encyclopedia) Regency, in British history, the period of the last nine years (1811–20) of the reign of George III, when the king's insanity had rendered him unfit to rule and the government was…

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…

The Last Stage of the Columbia

Chapter 19 Chapter 21 The Last Stage of the Columbia On the thirteenth of April the party reached the series of falls and rapids which they called the Long Narrows. At the point…