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Related to underlain: underlaid


Past participle of underlie.
References in periodicals archive ?
The Cigar Lake project, which is located on the southwest side of Waterbury Lake, is underlain by a well-defined basement ridge interpreted as a mylonite zone composed of pelitic gneisses.
Underlain by a Cretaceous dioritic batholith, the property hosts high-grade intrusive hosted copper-gold mineralization in subhorizontal fractures and veins over an area of at least four square miles.
Three of the eight properties (Piedrotas, Venaditas and Gabriela) are underlain by Chilitos volcanic units of the San Nicolas volcanic centre and are located west and southwest of the Western Copper/Teck joint venture lands.