Ultramafic

From Fresh Dictionary

English

Adjective

ultramafic

1. ((geology{{#if:|, {{{2}}}{{#if:|, {{{3}}}{{#if:|, {{{4}}}{{#if:|, {{{5}}}{{#if:|, {{{6}}}{{#if:|, {{{7}}}{{#if:|, {{{8}}}{{#if:|, {{{9}}}}}}}}}}}}}}}}}}})) Describing igneous rocks which contain magnesium and iron and only a very small amount of silica, such as are found in the Earth's mantle.

Synonyms

• ultrabasic