The Moeraki Boulders are striking spherical concretions that are weathering out of the mudstone cliffs on the east coast of the South Island. They are known as septarian concretions, having calcite veins that form within the cracks.
A wonderful part of God’s creation. The carrier shells have always fascinated me. They are the scavengers of the ocean, carefully gluing on pieces of broken and even whole shells, to fool predators. The circular saw shells belong to the same family. The most ornate carrier shell in this collection comes from the Philippines, the rest from New Zealand beaches. The largest circular saw shell is from near Cape Reinga, and is the biggest of that species I have seen.