Denniston Plateau (technically the Denniston-Stockton Plateau) is an 18 km long, 600-800 m high coalfield plateau in the Papahaua Range on the West Coast of the South Island of New Zealand. A combination of impermeable rock, high rainfall, and shallow acidic soil has created a unique ecosystem of stunted trees and heath-like vegetation which is home to numerous endemic and undescribed species of plants and invertebrates. The plateau contains rich seams of high-quality coal, which led to the creation and abandonment of the mining towns of Denniston and Millerton, and the current Stockton Mine. Plans to create a new open-cast mine on the southern part of the plateau have become an environmental controversy.