There are some excellent exposures (Figure 4) of an unusual course, polymict, clast-supported sedimentary deposit with well-rounded boulders of a number of different lithotypes including granitic and other felsic rocks, basaltic greenstone, chert and limestone. Boulders are up to a metre in diameter (Stidolph, 1977) but most range from 5 to 30 cm. This wedge-shaped outcrop is up to 300 m thick and extends for 2.3 km. Very good examples of pressure solution can also be seen. The origin of this deposit is up for debate.