Geomorphological Features of the Area to Be Established as a UNESCO Global Geopark in Phu Yen

The proposed area for establishment of Phu Yen Geopark is limited to 6 districts, towns and cities, including: Tuy Hoa City, Dong provincial town, An district, Song Cau town 3 communes, 1 in district communes Son with an 1,575 km2. Distributed the central coastal line, area's topography quite diverse, including mountains, hills, plains areas, divided into main origin types: 1) Terrain tectonics, volcanoes, architectural erosion, include: tectonic cavitation flanks Pliocene - Quaternary age; Highland ridge, Neogene highland Quaternary; Surface volcanic plateau has elevation less than 250 m; 300-400 m high; Cone ridge age crater; Structural eroded slope; Slope erodes edge dome intrusive blocks, quartz fracture zones; 2) formed by erosion – cavitation, Pediple leveled surface, Miocene 750 1100m early 450 600 late 300 400 Pediment Late Early Pleistocene 150 250m middle pedimen 50 120 Cavitation flank; crevices ditches flanks; Collapsed flank Synthetic Abrasion 3) rivers, River shelf level II, I, Holocene accumulation delta, age, bed low alluvial ground along riverbed, 4) sea, marine Middle Abrasive seashelf III, Sea 5-10 sand dyke connecting island, Modern beaches are flooded frequent tides; 5) include:formed mixed impact rivers river-sea delta (shelf) sea-swamp plain; river-swamp 6) wind, type dunes 15-25 terrain sandy hill altitude 105 m. Each associated diverse geological heritages: paleontological heritage; geomorphological stone heritage…