lördag 19 december 2009

Pancake rock

Pancake rocks, New Zealand.

These strange formations are caused by a chemical process. Long ago layers of lime-rich mud were deposited on the seabed and then overlayed by weaker sheets of soft mud and clay. The seabed was tilted and raised to form coastal cliffs, and wind and water have etched out the soft layers to produce the stark relief of stratified formations. The blowholes are the result of massive undermining of these weird structures by wave action. High seas surge into caverns, causing enough pressure to propel impressive geysers of spume and spray up through clefts in the rock.

Read MORE!

Scenic Sunday nr 75