Zebra Stone

This specimen is an example of a naturally banded sedimentary rock commonly referred to as “zebra stone” due to its striking light-and-dark striping. The alternating bands reflect changes in sediment composition during deposition, typically involving fine muds (clay-rich layers) and carbonate-rich material such as limestone. The parallel banding represents original sedimentary layering that has been compressed and lithified over time, and in some cases subtly modified by low-grade metamorphism associated with tectonic compression along the Kaikōura margin. The Kaikōura region is geologically significant for its complex mix of marine sedimentation, folding, faulting, and uplift related to the boundary between the Pacific and Australian tectonic plates.