Syncline= 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. A notable syncline is Wyoming's Powder River Basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building.

Anticline= In structural geology, an anticline is a fold that is convex up or to the youngest beds. On a geologic map, anticlines are usually recognized by a sequence of rock layers that are progressively older toward the center of the fold. The strata dip away from the center of the fold. If an anticline plunges (i.e., is inclined to the earth's surface), the surface strata will form Vs that point in the direction of plunge.(Monroe and Wicander, 230) An anticline that plunges at both ends to form a circular or elongate structure is a dome. An elongate dome which developed as the sediments were being deposited is referred to as a pericline.

Anticlines are typically flanked by synclines although faulting can complicate and obscure the relation between the two. Any fold whose form is convex upward, is an antiform, and most antiforms are anticlines. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building.

Anticlines are favored locations for oil and natural gas drilling; the fuel's low density causes it to migrate upward to the highest parts of the fold, until stopped by an impermeable layer.

you choose but personally i think anticline.

good luck !!