Basalt Reservation Area - Basalt lava from the oceanic crust is a type of volcanic rock, and such lava will cool rapidly when reaching the surface, thus contracting and chap into pentangle or hexagon columns, this is called "jointing ".
Wednesday, August 5, 2009
Penghu Islands - Wangan basalt
Basalt Reservation Area - Basalt lava from the oceanic crust is a type of volcanic rock, and such lava will cool rapidly when reaching the surface, thus contracting and chap into pentangle or hexagon columns, this is called "jointing ".
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