A cloudy dawn at the "Durdle Door" rock formation. This is part of the Jurassic Coast in Dorset, England.

Canon EOS 40D, Sigma 10-20mm F4-5.6 EX DC HSM, Adobe Lightroom.

The form of the coastline around Durdle Door is controlled by its geology--both by the contrasting hardnesses of the rocks, and by the local patterns of faults and folds.The arch has formed on a concordant coastline where bands of rock run parallel to the shoreline. The rock strata are almost vertical, and the bands of rock are quite narrow. Originally a band of resistant Portland limestone ran along the shore, the same band that appears one mile along the coast forming the narrow entrance to Lulworth Cove. Behind this is a 120-metre (390 ft) band of weaker, easily eroded rocks, and behind this is a stronger and much thicker band of chalk, which forms the Purbeck Hills. These steeply dipping rocks are part of the geological structure known as the Lulworth crumple, itself part of a broader monocline (a kinked type of geological fold) produced by the building of the Alps during the mid-Cenozoic.

Nikon D800E, Samyang 14mm F2.8 IF ED MC Aspherical.

Photo Settings: 14mm, f/9, 1/200 second, ISO 125.

Map: 50.6225, -2.2725

View of the coast from Durdle Door cove on the south coast of England. I liked how the cliffs fade into the horizon as waves from this angle.

Adobe Lightroom 4, Adobe Photoshop, Nik Color Efex Pro, Nik Sharpener Pro.

Nikon D90, Nikon AF-S DX NIKKOR 18-105mm f/3.5-5.6G ED VR.

Map: 50.6212, -2.2765