Scown's Runaway Hole
Scown's Runaway Hole is possibly the most spectacular in the district. During extremely wet winters, Poocher Swamp overflows and surplus water is directed along drains into this depression. Despite the volume of water pouring in, sometimes for weeks on end, the water level in the hold remains constant. During massive floods in 1981, the Engineering and Water Supply Department calculated that over 1300 litres per second (1,029,000 gallons per hour) were being absorbed into the underground system.
Most of the surplus water eventually finds its way down to the marine fossil bed through a series of sink holes (runaway holes). There are many along the western section of the Tatiara Nalang Creek course and are formed through the action of the water finding itw way through the upper layers of soil down to the porous limestone beneath. These runaway holes from the basis of the drainage of surplus water. By mid-summer, water has drained away or evaporated and the creeks are dry.