transition zone
101Unité structurale de la Terre — Article principal : Structure interne de la terre. Les unités structurales de la Terre sont les couches de matières qui la composent. Les principales unités structurales de la Terre sont la croûte, le manteau et le noyau. Chaque couche a ses …
102Earth 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… …
103California — For other uses, see California (disambiguation). State of California …
104Reflection seismology — (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth s subsurface from reflected seismic waves. The method requires a controlled seismic source of energy,… …
105Iraq — /i rak , i rahk /, n. a republic in SW Asia, N of Saudi Arabia and W of Iran, centering in the Tigris Euphrates basin of Mesopotamia. 22,219,289; 172,000 sq. mi. (445,480 sq. km). Cap.: Baghdad. Also, Irak. * * * Iraq Introduction Iraq Background …
106Port Authority of Allegheny County — Not to be confused with Port of Pittsburgh Commission. For other uses, see PAT (disambiguation). Port Authority of Allegheny County …
107Crustal recycling — Understanding predictions of mantle dynamics helps geoscientists predict where subducted crust will end up. Crustal recycling is a tectonic process by which surface material from the lithosphere is recycled into the mantle during subduction. The… …
108Lower Saxony — The subject of this article was previously also known as Saxony. For other uses, see Saxony (disambiguation). Lower Saxony Niedersachsen (German) Neddersassen (Low Saxon)   State of Germany   …
109Integrated Marine and Coastal Regionalisation of Australia — The Integrated Marine and Coastal Regionalisation of Australia (IMCRA), formerly the Interim Marine and Coastal Regionalisation for Australia, is a biogeographic regionalisation of the oceanic waters of Australia s Exclusive Economic Zone (EEZ).… …
110boreal forest — ▪ northern forest Introduction also called taiga vegetation composed primarily of cone bearing, needle leaved, or scale leaved evergreen trees, found in regions that have long winters and moderate to high annual precipitation. The… …
