Lexicon
The homepage of Macrostrat's geological lexicons, assembled from many sources including Canada's WebLex and the USGS's Geolex. They are continually updated in partnership with researchers and data providers.
Dictionaries
Geologic names
Names of rock units, organized hierarchically, and the concepts that relate differently-named units to each other.Lithologies
Names and hierarchies for geological materials.Intervals
Named spans of geologic time.Timescales
Groups of intervals used together to span time.Lithology attributes
Names and descriptions of lithology attributes.Environments
Depositional environments and formation mechanisms.Economics
Economic uses of geologic materials.Minerals
Mineral names and formulas.Structures
Names and descriptions of geologic structures.Tools
Lithology matcher
See how free lithology text — “cross-bedded fine sandstone (60%); shale” — resolves to Macrostrat's lithologies, attributes and proportions, as the column importer reads it.Stratigraphic name matcher
See how a stratigraphic name resolves against the lexicon and the columns at a place: the units it matches, ranked, with the basis for each.Sift, Macrostrat's legacy lexicon app, is still available while it is gradually brought into this framework.
