It was formed from an uplift which raised an ancient seabed of sandstone conglomerate and folded it into a dramatic anticline (like an inverted V shape). The beds dip away from the hinge. Anticlines (Non-Plunging) 1.) As the world's largest monocline Mt Augustus has a central ridge which is almost 8 kilometres long and it is estimated that the rock of the mountain is some 1000 million years old. Plunging hinge (c) A monocline looks like a stair step, and is commonly draped over a fault block. Source: Randa Harris (2015) CC BY-SA 3.0. view source. You can remember the difference by noting that anticlines form an "A" shape, and synclines form the bottom of an "S Figure 22. 28.2. The beds dip toward the hinge. (b) A syncline looks like a trough. Strike and Dip Symbols; Strike and dip are a way of representing the three-dimensional orientation of a planar surface on a two-dimensional map. PLUNGING FOLD : A fold whose axis is inclined at an angle (0