tell the water you love it
Traditional homeland of the Māori
Moeraki, Otago, New Zealand
Some 60 million years ago, the concretions we know as the Moeraki boulders started forming on the ocean floor. Centuries of coastline erosion revealed these spherical concretions; consisting of mud, fine silt and clay, cemented by calcite which were created by the cementation of the Paleocene mudstone. The rock comprising the bulk of a boulder is riddled with large cracks called septaria that radiate outward from a hollow core lined with calcite crystals. The process or processes that created septaria concretions, remain unknown. Some of the larger boulders took 4-5.5 million years to form.