Manage data about chronostratigraphy

External resources

• Correlation of Stratigraphic Units of North America-COSUNA: An important resource for information about North American rock units. Not digitally accessible without an institutional login.
• Léxico Estratigráfico de México: Lexicon documents the various stratigraphic units in Mexico.
• Lexicon of Canadian Geological Names on-line: WEBLEX Canada provides information about over 16,000 published geological names used in Canada.