うりずん露頭
カテゴリー： 地質現象
撮影者： 小松原純子
この露頭では琉球列島周辺が泥質な海からサンゴ礁の海となった最初の証拠を見ることができる．露頭右下に泥質な島尻層群（鮮新統）と砂質な知念層（鮮新統-更新統）の境界が露出している．村営グラウンド作成中に一瞬出現した好露頭が偶然発見され，微化石・古地磁気の詳細なサンプリングが行われた．正面の穴は壁面をハンマーで削り，よじ登ってサンプリングをした跡．うりずんとは沖縄の言葉で一年中で一番良い初夏の気候のこと．
"Urizun Outcrop" locality: Chinen Village, Okinawa Island.
This excellent exposure in a construction site, named as Urizun Outcrop, was discovered by geologists in 2001. The boundary of the muddy Shimajiri Group (Pliocene) and the sandy Chinen Formation (Plio-Pleistocene) is exposed in a lower right end of this outcrop. Excavations in a line from the base to the top was digged with geological hammer to climb up the wall for micropaleontological and paleomagnetic samples. No one can see the section any more because it had been covered with construction materials completely. "Urizun" means the best season in Okinawa at the beggining of summer.