单词	ultramafic
释义	ultramafic /ˌʌltrəˈmafɪk / adjective Geology Relating to or denoting igneous rocks composed chiefly of mafic minerals.Variably serpentinized Devonian mafic and ultramafic intrusive rocks occur in the western and northern parts of the map area.... 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. 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.
随便看	Maatschappij MAb mabalane maban mabe mabela mabele Ma Bell Mabinogion Mabo mabuhay Mabuse, Jan mac maca check rein checkroom checks and balances checkside checkside goal checkside punt check someone in check someone/thing out check something in check something off check something over

英语词典包含243303条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。