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121Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
122Volcano — This article is about the geological feature. For other uses, see Volcano (disambiguation) …
123Pacific Ring of Fire — The Ring of Fire redirects here. For other uses of the term, see Ring of Fire (disambiguation). The Pacific Ring of Fire (see below) …
1241980 eruption of Mount St. Helens — Photograph of the eruption column, May 18, 1980 Volcano Mount St. Helens …
125Blackwater river — A blackwater river is a river with a deep, slow moving channel that flows through forested swamps and wetlands. Decaying vegetation in the water results in the leaching of tannins from the vegetation, resulting in transparent, acidic water that… …
126Geometric flow — In mathematics, specifically differential geometry, a geometric flow is the gradient flow associated to a functional on a manifold which has a geometric interpretation, usually associated with some extrinsic or intrinsic curvature. They can be… …
127Modified internal rate of return — The modified internal rate of return (MIRR) is a financial measure of an investment s attractiveness.[1][2] It is used in capital budgeting to rank alternative investments of equal size. As the name implies, MIRR is a modification of the internal …
128Nile — For other uses, see Nile (disambiguation). Coordinates: 30°10′N 031°06′E / 30.167°N 31.1°E / 30.167; 31.1 …
