2.1 Concepts and laws 1 Sed environments 2 Sedimentary facies 3 Facies changes and analysis of sed-facies 4 Walther's law 5 Uniformitarianism1 Sed. environments 2 Sedimentary facies 3 Facies changes and analysis of sed-facies 4 Walther’s law 5 Uniformitarianism 2.1 Concepts and laws