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Water & the Primordial Earth

Water & the Primordial Earth

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Water & the Primordial Earth

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  1. Water & the Primordial Earth • Zircons • 4.3 bya • Early Faint Sun Paradox

  2. Location Systems • Latitude & Longitude • Grid of reference lines • Cross at right angles

  3. Latitude • Parallels • Parallel to equator • Latitudinal distances do not vary anywhere on Earth • 1º lat = 111.32 km = 60 nm • 1’ lat = 1 nm

  4. Longitude • Meridians • 90º to lat lines • Longitudinal distances vary with distance from the equator • At 0º lat, 1º long = 111.32 km • At 30º lat, 1º long = 96.49 km • At 60º lat, 1º long = 55.80 km • At 90º lat, 1º long = 0 km