Figure 8.17 | The three main fold types, from left to right, are monocline, anticline, and syncline (the anticline and syncline are both displayed in the right block in the figure). GG303 Lecture 28 9/4/01 5 Stephen Martel 28-5 University of Hawaii “A” is for “anticline,” and the capital letter “A” represents the shape of the fold. Figure 22. (a) An anticline looks like an arch. on surface will appear as a series of parallel rock bands elongated on the axis of fold NON PLUNGING FOLD : A fold whose axis is horizontal on the plunge of the fold axis is 0 degree. 28.2. A monocline (or, rarely, a monoform) is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently-dipping sequence. A monocline is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently-dipping sequence. Anticline- older in center and Syncline- youngest rock in center Anticlines are folds in which each half of the fold dips away from the crest. oldest beds in the center of the folds (both in map/transverse cross-section) 2.) The beds dip away from the hinge. Anticline 2. Synclines are folds in which each half of the fold dips toward the trough of the fold. Basin 5. Anticline showing fold hinge line and strike and dip symbols. (e) A dome has the shape of an overturned bowl. Monocline: gentle anticline-syncline pair with horizontal outer limbs Overturned syncline: one limb of syncline is overturned Overturned anticline: one limb of anticline: is overturned Overturned folds Monocline Fig. The beds dip toward the hinge. Dome. A monocline, or monoform, is a fold in rock strata with a zone of steeper dig on a horizontal or gently-dipping sequence, like a step. Source: Randa Harris (2015) CC BY-SA 3.0. view source. (d) A plunging anticline has a tilted hinge. 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. block diagram of a monocline The Grandview-Phantom Monocline in the Grand Canyon , Arizona The last type of the major folding structures is the monocline, often described as “half an anticline”—there is only one dipping limb coming off flat or horizontal layers. (f) A basin has the 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. 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). Anticlines (Non-Plunging) 1.) (b) A syncline looks like a trough. Anticline. Monolith vs Monocline A monolith is a geological feature consisting of a single massive stone or rock. Anticline, Split Mountain Syncline Monocline. An anticline is a fold that is convex: it curves like a rainbow. Plunging hinge (c) A monocline looks like a stair step, and is commonly draped over a fault block. – Strike is the compass direction of the intersection of the plane with the Syncline 3. You can remember the difference by noting that anticlines form an "A" shape, and synclines form the bottom of an "S Monocline 4. PLUNGING FOLD : A fold whose axis is inclined at an angle (0