* '''Folding:''' the movement of material not only produces fracturing but also the folding of the overlying material. These folds are important because they may constitute important reservoirs and traps, even exploited in several basins in the world (Fig 9). | * '''Folding:''' the movement of material not only produces fracturing but also the folding of the overlying material. These folds are important because they may constitute important reservoirs and traps, even exploited in several basins in the world (Fig 9). |