according to this legend, are the remains of the canoe's fishing nets. In 1848, Walter Mantell sketched the beach and its boulders, more numerous than now. The picture is now in the Alexander Turnbull Library in Wellington. See also Bowling Ball Beach Concretion List of rock formations of New Zealand Martian spherules Moqui Marbles Rock City, Kansas Stone spheres of Costa Rica References Further reading Brunsden, D., 1969, Mystery of the Moeraki and Katiki boulders. Geographical Magazine. v. 41, n. 11, pp. 839–843. Klug, H., and R. Zakrzewski, R., 1986, Die Moeraki Boulders; Riesenkonkretionen am Strand auf Neuseelands Suedinsel (The Moeraki boulders; giant concretions of the beach of New Zealand's South Island) Schriften des Naturwissenschaftlichen Vereins fuer Schleswig-Holstein. v. 56, pp. 47–52 External links Moeraki Boulders Biek, B., 2002, Concretions and Nodules in North Dakota North Dakota Geological Survey, Bismarck, North Dakota. Hokianga Tourism Association, nd, Koutu boulders Pictures of cannonball concretions similar in size and origin to Moeraki Boulders. Irna, 2006, All that nature can never do, part IV : stone spheres Irna, 2007, Stone balls : in France too! Mozley, P.S., 1999, Concretions, Bombs, and Ground Water, Lite Geology, v. 14, p. 1-3 (Winter 1995) United States Geological Survey, nd, cannonball concretion Beaches of Otago Coastline of New Zealand Rock formations of Otago