Tuesday, May 24, 2011
The Great Barrier Reef- Australia
Skardu Valley – Pakistan
Pamukkale“castle-Turkey
The tectonic movements that took place in the fault depression of the Menderes river basin triggered frequent earthquakes, and gave rise to a number of very hot springs. The water of these springs, with its large mineral content, chalk in particular created Pamukkale. Apart from some radioactive material, the water contains large amounts of bicarbonate and calcium, which leads to precipitation of calcium bi-carbonate.
Every second 250 liters of hot water emerges from this spring, precipitating 2.20 grams of lime per liter of chalk or 0.55 kilograms per second. Over time, some sources dried up because of earthquakes, while new ones emerged in the area.
The effect of this natural phenomenon has left thick white layers of limestone and travertine cascading down the mountain slope resembling a frozen waterfall. One type of these formations is travertine terraces formed by crescent-shaped with a surface layer of water, lying in a staggered arrangement of the upper third of the slope, with steps ranging from 1 million to 6 feet high. The other way is to stalactites, propping up and connecting these terraces.
The oldest of these rocks is crystalline marble, quartzite and schist. These date back to the Pliocene period, while the upper layer belongs to the Quaternary. new deposits of calcium carbonate give the site a dazzling white appearance.
Monday, May 23, 2011
Statue of Liberty in New York-America
Fingal's Cave-Scotland
Fingal's Cave, on the island of Staffa off the west coast of Scotland (near Mull and Iona), is a sea cave formed within Tertiary basalt lava flows which have cooled to form hexagonal columns (like those of the Giants Causeway in Northern Ireland). There is a path in on one side which involves stepping from the top of one column to the next. The cave stretches 250 feet in to the rock and its roof is 70 feet above the sea. Fingal's cave was the inspriration for Mendelssohn's Hebridean overture.The cave has a large arched entrance and is filled by the sea; however, boats cannot enter.
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