Evolution of a Concept -- Stratigraphy: Evolution of a Concept -- The Search for Patterns: Ordering the Framework -- Buried Time: Chronostratigraphy as a Research Tool -- Ecostratigraphy’s Basis, using Silurian and Devonian Examples, with Consideration of the Biogeographic Complication -- Devonian Palynostratigraphy in Western Gondwana -- Carboniferous and Permian Palynostratigraphy -- Biostr…