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Spotted 100M in Sierra Cave, Callao Ecotourism Zone, Peñablanca, Cagayan. About 5cm in diameter.
Those holes seen first picture at left side look like fossils from Shells.
That's possible but we thinking it's an impression of a shell because of the coral impression and fossils nearby. http://www.projectnoah.org/spottings/931...
Look like carving work... But not sure... Need to learn about related civilization language that time caves were used.
Lat: 17.71, Long: 121.89
Spotted on Sep 28, 2011 Submitted on Mar 1, 2012