Weathered “boulder” – these boulders are not conventional weather-worn rock, but were formed by concretion around some seed object. In fact, their origin has been linked to marine reptiles of the Jurassic period. These boulders erode from the inside out.
Shag Point (Matakaea), South Island, New Zealand
(ref fotoWERNER 3H1002.8816)
Nikon D300 | Nikon 12-24DX @ 13mm | CP filter
1/125s f/22 ISO640
Featured in Volcanoes, Earths Geology, Atmosphere (13 March 2010)