Geologically, sand from granite from the mountain was deposited for 300 meters from the ground surface and, below that to 1,040 meters; it consists of argilliferous soil and, after 1,040 meters, base rock layer..
地質的には地表より300ｍは花崗岩の砂が山より堆積しており、それ以降1040ｍまでは粘土質で、1040ｍ以降は岩盤層に変化しています。