Friday, May 4, 2012



The contents of the sand were checked with a magnifying glass in their natural state, and then after having HCL dripped on them:

Sand is made up of crystals of 80-90% Quartz (white), 7-10% Calcite (yellow) and
3-5% dark minerals containing iron (black).

In its natural state black, yellow and white crystals can be seen.  After having HCL dripped on it, less black and yellow, and more white crystals can be seen.

Sand has contains Quartz than sandstone.

Waves, produced by the wind, bring the sand to the beach (from the Sahara to Israel). The direction the waves hit the beach depends on the direction of the wind.  The sand is then swept straight out to sea, and then brought in again on more waves.  As the direction of the wind in Israel is usually from the south west, the sand is carried north east by the waves, lands on the beach and is then carried westwards out to sea again.  The process continually moves sand northwards along the shore.

Dry sand on the beach can only be carried about 30 cm by the wind before it lands again.  It is then picked up by the wind and carried on again.  If the sand in the wind hits something solid, it stops traveling and builds up.  This can eventually form dunes.

With rain, the Calcite in dunes dissolves and sinks to the bottom.  The water then evaporates.  The Calcite wraps around the Quartz and eventually sandstone rock is formed.  Sandstone is a fossilized dune, and eventually makes low ridges along the shoreline.

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