Limestone outcrops on cliffs. Punakaiki South Island - New Zealand. Pancake rocks form the main focus for visitors in Paparoa National Park where high outcrops of limestone have been formed by a process called stylobedding. This chemical process has caused sediments to be laid down in alternate bands of durable and less durable layers. Subsequent uplift and weathering has resulted in immense stacks of photogenic limsestone interspersed with blowholes a spectacular vista drawing thousands of visitors each year.