All the limestone around the Staveley area is flaky like this, but moderately hard only. The advantages of easy quarrying and breaking would have been offset by higher waste both at quarrying (pieces ending up too small) and lower burning efficiency (smaller pieces slow down the burning by "packing" and restricting air flow in the kiln)
The quarries associated with the Pot Kiln were connected to it by a tramline which can still be traced. The Quarries are on private land adjacent and no access is possible. They form an interesting warren of cuts and tunnels and excavations as the limestone which burned best was traced and preferentially quarried.
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Photo taken in Staveley 7771, New Zealand
Misplaced? Suggest new location