Source: Randa Harris (2015) CC BY-SA 3.0. view source. (e) A dome has the shape of an overturned bowl. – Strike is the compass direction of the intersection of the plane with the Syncline 3. Plunging hinge (c) A monocline looks like a stair step, and is commonly draped over a fault block. GG303 Lecture 28 9/4/01 5 Stephen Martel 28-5 University of Hawaii block diagram of a monocline The Grandview-Phantom Monocline in the Grand Canyon , Arizona (b) A syncline looks like a trough. 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). PLUNGING FOLD : A fold whose axis is inclined at an angle (0