📚 Ultramafic, adjective. 🔉 /ˌʌltrəˈmafɪk/ 🇬🇧 ❓ Definition (Geology): Relating to or denoting igneous rocks composed chiefly of mafic minerals. ❗️ Examples: 1. Variably serpentinized Devonian mafic and ultramafic intrusive rocks occur in the western and northern parts of the map area. 2. A major source of iron, called iron laterite, is a type of residual deposit generated by the intense weathering of iron-rich rocks such as mafic and ultramafic volcanic rocks. 3. The provenance of the feldspar-bearing Crocker Formation and younger sandstones indicates a granitic source character, which conflicts with the abundance of mafic and ultramafic basement rocks exposed throughout much of Sabah. 4. Both Wadi Sikait and Regal Ridge classify as Type I emerald deposits, where Be-bearing quartz or pegmatite veins from a granitic pluton intruded Cr- or V-bearing mafic or ultramafic rocks. ━━━━━━━━━━━━━ 🌀 @cambridge_dic