Strata are layers. Stratification is the separation of different items into layers or tiers.

Strata refers to distinct layers or divisions within a rock formation or other material. Stratification refers to the process of arranging or forming these layers. In essence, strata are the actual layers, while stratification is the process of layering.

Differing layers or 'strata' of something.

Erosion of exposed strata with subsequent sedimentation and stratification and folding of strata from horizontal forces or tilting.

Strata refers to the individual layers in sedimentary rock. On occassion, igneous rock can also demonstrate stratification.