A method of smoothing solar data by beta probality distributions is applied to process daily sunshine duration data recorded at thirty-three meteorological stations in Algeria for eleven year periods or more. Knowing the sunshine duration data
, and smooth folds with NNE trending axes, all corroborated with shallow well data in the graben and fieldwork on edges. Cenozoic paleostress succession was determined through fault slip and calcite twin inversion, taking into account data of relative