Sra Pleng Quarry (ลานหินตัดสระเพลง) is hidden away in a forest at the foot of the Sankamphaeng Mountains in the south-central part of Ta Phraya National Park. A geologist from the Ministry of Mineral Resources who visited identified this grey sandstone as from the Phu Kradung Formation, which dates to around 150 million years ago. Geological maps of Thailand I’ve seen show this area to be the younger Sao Khua or… Read More