November 13, 2007 - Moeraki Boulders, spherical septarian concretions created by cementation of Paleocene mudstone of the Moeraki formation, Koekohe Beach, New Zealand.

koekohe beach moeraki boulders new zealand otago region paleocene tertiary beach boulder coast coastline color image concretion cracked day earth science eroded formation geology geoscience mudstone nature no people outdoors photography rare rock rock formation round science sedimentary rocks septarian concretions solid spherical stone vertical