stagnant basin
71glacial lake — a) A lake that derives much or all of its water from the melting of glacier ice, fed by meltwater, and lying outside the glacier margins (e.g., proglacial lake) or lying on a glacier (e.g., ice walled lake, ice floored lake) and due to… …
72Sarasvati River — The Sarasvati River (Sanskrit: सरस्वती नदी sárasvatī nadī) is one of the chief Rigvedic rivers mentioned in ancient Hindu texts. The Nadistuti hymn in the Rigveda (10.75) mentions the Sarasvati between the Yamuna in the east and the Sutlej in the …
73Eutrophication — The eutrophication of the Potomac River is evident from its bright green water, caused by a dense bloom of cyanobacteria. Eutrophication (Greek: eutrophia healthy, adequate nutrition, development; German: Eutrophie) or more precisely… …
74Danube Delta — Danube Delta * UNESCO World Heritage Site Country Romania …
75coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …
76Tunisia — Tunisian, adj., n. /tooh nee zheuh, sheuh, nizh euh, nish euh, tyooh /, n. a republic in N Africa, on the Mediterranean: a French protectorate until 1956. 9,183,097; 48,330 sq. mi. (125,175 sq. km). Cap.: Tunis. * * * Tunisia Introduction Tunisia …
77Area 51 — This article is about the U.S. Air Force installation in Nevada. For other uses, see Area 51 (disambiguation). Area 51 …
78Cretaceous — Period 145.5–65.5 million years ago …
79Snowball Earth — The Snowball Earth hypothesis as it was originally proposedcite book author = Kirschvink, J.L. year = 1992 chapter = Late Proterozoic low latitude global glaciation: The snowball Earth title = The Proterozoic Biosphere: A Multidisciplinary Study… …
80Santa Barbara County, California — County of Santa Barbara   County   Seal …
