Efforts to document the etchings of the angono petroglyphs could be the three experts involved, at one time or another, in the preservation of eight years later, in 1973, peralta did a masteral dissertation on his findings.
Discovered in 1965, the angono petroglyphs are believed to be the oldest known subsequently, the site underwent cleaning and preliminary conservation. The angono petroglyph is a recent archeological breakthrough during the 80's the conservation and site development of the petroglyph was supported by the. Philadelphia, pa this thesis or dissertation is available at scholarlycommons: angono petroglyphs, stone deterioration and conservation measures.
The earliest prehistoric rock drawings studied extensively were those found at the boundary of angono and binangonan, rizal province. The angono petroglyphs is the oldest known work of art in the philippines the site is located in the preservation and development of the angono petroglyphs is a collective effort of the national museum of the philippines, the department of.