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Stratigraphy = Branch of geology concerned with the order and relative position of strata and their relationship to the geological time scale. // Rama de la geología que se ocupa del orden y la posición relativa de los estratos y su relación con la escala de tiempo geológico.
Elsewhere on the Web
stratigraphy.org
IUGS –
Geobiodiversity Database – formal database of ICS, which aims to produce comprehensive and authoritative web-based stratigraphic information service for global geoscientists, educators and the public
UNESCO-natural sciences division
Commission for the Geological Map of the World
Stratigraphy.net – aims to provide free and open access to geoscientific information and data with special emphasis on the disciplines stratigraphy, paleontology and sedimentology
Nacstrat.org – website for the North American Commission on Stratigraphic Nomenclature
Stratigraphic Chart of Austria 2004
New Zealand Geological Timescale
CHRONOS – Interactive Chronostratigraphy and Stratigraphic Databases
GEOWHEN Database aims to reconcile the international stratigraphic standards with many of the regional and archaic naming schemes that appear in the literature
Micropaleontology Project – at American Museum of Natural History, New York
Cretaceous Tethyan Stratigraphy – Building up a detailed knowledge of the Cretaceous stratigraphy in the Tethyan realm
GeoStrat – An Internet Prototype Tracking System for Geology Related Information
German Stratigraphical Commission
Headlines
http://skyalert.mx/2018/07/23/nueva-edad-geologica
Planeta.com