Satellite map of Huangnitang
Huangnitang (simplified Chinese: 黄泥塘; traditional Chinese: 黃泥塘; pinyin: Huángnítáng) is a village in Zhejiang province, China. It is the location of the Global Boundary Stratotype Section and Point (GSSP), which marks the boundary between the Third and Darriwilian Stages of the Middle Ordovician.
Latitude: 28° 49' 32.99" N
Longitude: 118° 38' 17.39" E