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Plate Tectonics… A Spreading Zone… and a Slab of Chocolate

March 8th, 2013 | 8 Comments |

Plate Tectonics… A Spreading Zone… and a Slab of Chocolate

Here is an explanation of how plate tectonics in a spreading zone, moves…. using a slab of chocolate…. as you do…. and a bit of imagination. . The choc’ based explanation, may help visualise how the spreading process works and could help understand what can be seen on the geological map, shown below. A brief on plate tectonics general: Plate tectonics is the name given to a process that takes place all over the Earth surface crust. The entire … Read entire article »

Filed under: Earth and Oceanographic Processes

Isostatic changes… Sea level changes… and a Rice Pudding.

November 30th, 2012 | 8 Comments |

Isostatic changes… Sea level changes… and a Rice Pudding.

The planet Earth on which we stand, has a thin surface skin (lithosphere), which floats on top of a much thicker, semi-fluid, hot layer (asthenosphere). . . A home made rice pudding with a skin comes in useful to visualise this and can be used to demonstrate a much larger, real Earth occurrence. . . This real Earth occurrence is known as Isostatic Change, a vertical movement, both up and down, of the lithosphere. This can effect coastal communities by altering their … Read entire article »

Filed under: Earth and Oceanographic Processes