Sugarloaf Rock, Leeuwin Inlier, Western Australia. A large-scale, west-verging, northeast-plunging asymmetric antiform. The lithologies include a pink, migmatitic monzogranitic gneiss interlayered with a migmatitic, grey, granodioritic gneiss containing abundant boudinaged amphibolite layers, tightly folded mafic dykes can be observed on the western margin of the exposure.