Water & the Primordial Earth Zircons

4.3 bya

Early Faint Sun Paradox

Chapter 2

Chapter 2

Location Systems Latitude & Longitude

Grid of reference lines Cross at right angles

Chapter 2

Latitude

Parallels Parallel to equator Latitudinal distances do not

vary anywhere on Earth 1º lat = 111.32 km = 60 nm 1’ lat = 1 nm

Chapter 2

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

Chapter 2