Subject: The Earth A fold in which the limbs dip toward the axis (concave upward). After erosion, the youngest beds are exposed in the central core of the field. Contrast with anticline.[ Pics List
                                                            
                                                     
                        
                                                
                        
                        
                            Subject: Geography A fold in rock layers that forms a trough-like bend. more[ Pics List
                                                            
                                                     
                        
                                                
                        
                        
                            A concave-upward fold in rock, i.e. the limbs are raised and the center depressed.
                                                            
                                                     
                        
                                                
                        
                        
                            Concave fold in stratified rock, in which strata dip down to meet in a trough.
                                                            
                                                     
                        
                                                
                        
                        
                            A concave fold, the central part of which contains the youngest section of rock. See also anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            A fold in layers of rock caused by deformation of the earth's crust. Synclines are basin-shaped and have the younger strata towards the centre of the fold.
                                                            
                                                     
                        
                                                
                        
                        
                            A rock formation opposite of anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            Figure A syncline is a fold in rocks in which the layers are bowed downward, resulting in a bowl-shaped structure. The younger rocks are toward the center of a syncline.
                                                            
                                                     
                        
                                                
                        
                        
                            A concave fold in bedrock
                                                            
                                                     
                        
                                                
                        
                        
                            a fold in rocks in which the strata dip inward from both sides (limbs) toward the axis. A fold, which is concave upward.
                                                            
                                                     
                        
                                                
                        
                        
                            A convex-downward fold in which the strata have been bent to form a trough; the strata on either side of the core of the trough are inclined in opposite directions toward the axis of the fold; the core area of the fold contains the youngest rocks. (see also Anticline).
                                                            
                                                     
                        
                                                
                        
                        
                        
                                                
                        
                        
                            a downfold , usually occurring between two anticlines
                                                            
                                                     
                        
                                                
                        
                        
                            a feature that is formed by the folding of the Earth's crust, usually associate with compressional tectonic forces
                                                            
                                                     
                        
                                                
                        
                        
                            a fold structure in which the sides of the fold slope together
                                                            
                                                     
                        
                                                
                        
                        
                            a geologic formation that results in the strata being concave up such that the youngest rocks are in the center, much like a bowl
                                                            
                                                     
                        
                                                
                        
                        
                            a structure in which the layers or strata form a downward curve)
                                                            
                                                     
                        
                                                
                        
                        
                        
                                                
                        
                        
                            A fold of rock layers that is convex downwards. Youngest rocks located in the center of the syncline. Syncline
                                                            
                                                     
                        
                                                
                        
                        
                            Landform. Layers of rocks bowed down in the middle to create a trough. See also Anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            structural term used to describe a downwardly bent or flexed fold of rocks.
                                                            
                                                     
                        
                                                
                        
                        
                            Rock layers that have been bent so that they bow downwards or fold convex side down.
                                                            
                                                     
                        
                                                
                        
                        
                            a downward fold in layered rock, primarily sedimentary rocks, caused by compression forces ; opposite of an Anticline
                                                            
                                                     
                        
                                                
                        
                        
                            a downward fold in rock beds
                                                            
                                                     
                        
                                                
                        
                        
                            A fold in layered rock in the form of a dip or bowl.
                                                            
                                                     
                        
                                                
                        
                        
                            A folded structure in which the youngest rocks are exposed in the center when the structure is eroded. Like anticlines, these are formed by compression. (Image)
                                                            
                                                     
                        
                                                
                        
                        
                            A fold of rock, of which the core contains the stratigraphically younger rocks, generally concave upward.
                                                            
                                                     
                        
                                                
                        
                        
                            Syncline - A fold in bedded rock in which the bed dips toward one another.
                                                            
                                                     
                        
                                                
                        
                        
                            A trough-shaped fold with youngest strata in the center.
                                                            
                                                     
                        
                                                
                        
                        
                            A downward fold in the crustal rocks, See anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            a fold of strata forming an inverted arch
                                                            
                                                     
                        
                                                
                        
                        
                            A trough-shaped fold whose limbs dip toward the hinge.
                                                            
                                                     
                        
                                                
                        
                        
                            Trough-shaped subsurface structure of folded stratified rock. Opposite of anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            A down-arching fold in bedded rocks.
                                                            
                                                     
                        
                                                
                        
                        
                            an elongated fold in sedimentary rock that resembles a trench, rock layers slope upwards in opposite directions from the central axis
                                                            
                                                     
                        
                                                
                        
                        
                            A fold of which the core contains the stratigraphically younger rocks; it is generally concave upward.
                                                            
                                                     
                        
                                                
                        
                        
                            A fold of rock layers that is convex downwards. Antonym of anticline.
                                                            
                                                     
                        
                                                
                        
                        
                            A trough of stratified rock in which the beds dip toward each other from either side.
                                                            
                                                     
                        
                                                
                        
                        
                            fold structure with a trough shape where geologic stratas dip toward the trough axis.
                                                            
                                                     
                        
                                                
                        
                        
                            A fold in rock in which the strata dip inward from both sides toward the axis. The opposite of anticline. Return to TERMS MENU
                                                            
                                                     
                        
                                                
                        
                        
                            trough-like fold of rock layers, usually on a grand scale covering many miles over land.
                                                            
                                                     
                        
                                                
                        
                        
                            A fold in rocks, it is concave upward, down folded layers. Township, is the township coordinates on the USGS maps.
                                                            
                                                     
                        
                                                
                        
                        
                            A downfold of layered rocks in the form of a trough.
                                                            
                                                     
                        
                                                
                        
                        
                            A basin shaped fold or fold system
                                                            
                                                     
                        
                                                
                        
                        
                            An arched fold in the shape of a U.
                                                            
                                                     
                        
                                                
                        
                        
                            a fold or folds of rock strata sloping downward from opposite directions so as to form a trough or inverted arch. [AHDOS
                                                            
                                                     
                        
                                                
                        
                        
                            In structural geology, a syncline is a downward-curving fold, with layers that dip toward the center of the structure. On a geologic map (or "in map view"), synclines are recognized by a sequence of rock layers that grow progressively younger, followed by the youngest layer at the fold's center or hinge, and by a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate circular the structure is a basin.