GEOLOGY

Detailed explanation-1: -A syncline is a fold that bends downward, causing the youngest rocks are to be at the center and the oldest are on the outside.

Detailed explanation-2: -Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline).

Detailed explanation-3: -A compressive stress compacts horizontal rock layers and forces them to bend vertically, forming fold patterns. Anticlines and synclines. An anticline is a fold that is arched upward to form a ridge; a syncline is a fold that arches downward to form a trough (Figure ).

Detailed explanation-4: -Anticlines and synclines are caused when tectonic plates move together and compress the earth’s crust between them. Having nowhere else to go, the crust rises into folds much like a rug would if the ends were pushed together. Tectonic plates are the massive slabs of land that make up the earth’s crust and upper mantle.