The search forms available from this page will allow searches of the database on sites in central Mexico with tephra layers. Sites are available for tephra layers found in the Basin of Mexico, the Toluca Basin and Michoacán.
Location of tephras(tephra layer sites)
Geochemistry Search 1(show geochemistry of a layer)
Search 1
Geochemistry Search 2(by geochemical properties)
Search 2