Keywords

In economic geology, an alluvial deposit consisting mainly of gravel but commonly including sand and clay.  The gravel and sand may be used as a construction material, either directly as fill or as aggregate in concrete.

Geological keywords, such as “granite”, “lake”.  The definitions are generally taken from the AGI Glossary of Geology.  Keywords with a geographic context (e.g. Cape Smith Fold Belt, Selwyn Basin, Grenville Province) are assigned to a separate category.