Portland Limestone

Limestone is partially soluble, especially in acid, and therefore forms many erosion landforms. These include limestone pavements, pot holes, caves and gorges. Such erosion landscapes are known as karsts. Limestone is less resistant than most igneous rocks, but more resistant than most other sedimentary rocks. Limestone is therefore usually associated with hills and downland and occurs in regions with other sedimentary rocks, typically clays. Bands of limestone emerge from the Earth's surface in often spectacular rocky outcrops and islands. Examples include the Verdon Gorge in France; Malham Cove in North Yorkshire, England; and the Ha Long Bay National Park in Vietnam. This photograph was taken at West Lulworth Coast where Portland stone is still visible.
Picture © 2004 onwards by Dr Sanjukta Acharya. All the photographs in this blog are copyright protected and can not be reproduced or stored in any medium without the written permission from Dr Himanshu Tyagi.