geodynamics
71Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …
72Gulf of Mexico — The Gulf of Mexico in 3D perspective Earth s oceans (World Ocean) Arctic Ocean Atlanti …
73North Sea — For other uses, see North Sea (disambiguation). North Sea Location Atlantic Ocean Coordinates …
74Valley — In geology, a valley (also called a vale, dale, glen or strath and near or in Appalachia, a draw) is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge. The terms U shaped and V shaped… …
751976 — This article is about the year 1976. For the comic set in this year, see 76. For the unrelated comic book characters, see Spirit of 76 (comics). Millennium: 2nd millennium Centuries: 19th century – 20th century – 21st century… …
76Salzburg — This article is about the capital of the Austrian state of Salzburg. For other uses, see Salzburg (disambiguation). Not to be confused with Sulzburg. Salzburg …
77Manchuria — For other uses, see Manchuria (disambiguation). Manchuria Extent of Manchuria according to: Definition 1 (dark red) Definition 2 (dark red + medium red) Definition 3 (dark red + medium red + light red) …
78Geographic coordinate system — Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 3.12MB) …
79Age of the Earth — This article is about scientific estimates of the age of the Earth. For religious and other non scientific estimates, see Dating Creation. Earth as seen from Apollo 17 The age of the Earth is 4.54 billion years (4.54 × 109 years ± 1%) …
80Earth science — (also known as geoscience, the geosciences or the Earth Sciences), is an all embracing term for the sciences related to the planet Earth [ [http://wordnet.princeton.edu/perl/webwn?s=earth%20science Wordnet Search: Earth science] ] . It is… …
