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# Older Oceanic Crust - Pacific Ocean * **4 an Evidence** * It allows scientists to visualize magnetic stripes in the ocean floor and construct a magnetic polarity time scale. * Sediments move sideways * Thin - deep * Thick - shallow/mababaw * Properties of sediment...

# Older Oceanic Crust - Pacific Ocean * **4 an Evidence** * It allows scientists to visualize magnetic stripes in the ocean floor and construct a magnetic polarity time scale. * Sediments move sideways * Thin - deep * Thick - shallow/mababaw * Properties of sediment * Particle size, shape and specific gravity # Rock and Mountain Correlation * Rocks in different continents appear to have the same age and type * Notable Examples: 1. Appalachian Mountains (North America) 2. Scottish Highlands 3. Karoo System (South Africa) and Santa Catarina system (Brazil) 4. Paleoclimate Data * Type of climate in the past * Coal is found in Antarctica * Glacial striations are found in tropical areas. * Dead plants, black sediment rock * **Magnetic Reversal** * Magnetic patterns in magnetic rocks, especially those found in the ocean floor. * Magnetic rocks found in ridges * Mid-Atlantic Ridge between South America and Africa * **Also called "Magnetic Pole Reversal" or "Magnetic Flip"** * Switch poles - 2 poles (dipole) * **Why is there a magnetic reversal?** * The poles of magnetic field reserves clue to the change in direction of flow in the outer core.