Imperial College Rock Library

Glossary: Syntaxial Growth

    A syntaxial growth is a crystallographically oriented overgrowth of a mineral on a substrate of the same chemical composition. Syntaxial overgrowths are common in cements in sedimentary rocks including quartz overgrowth cements and calcite syntaxial cements and syntaxial rims. In carbonate rocks syntaxial rims are common around echinoid bioclasts since these often consist of a single calcite crystals. Syntaxial overgrowth in igneous rocks occurs in cumulates by secondary growth. Where the overgrowth mineral is different from the underlying substrate it is known as epitaxial growth.

Related Terms

epitaxial growth, cement, cumulate

Example Images


A XPL image showing a longitud... view   view rock

A XPL image showing syntaxial ... view   view rock

A XPL image showing mollusc an... view   view rock

A XPL image showing a syntaxia... view   view rock

A XPL image showing syntaxial ... view   view rock

A XPL image showing syntaxial ... view   view rock

A XPL image showing echinoid b... view   view rock

A PPL image showing echinoid b... view   view rock

A XPL image showing porous, si... view   view rock

A PPL image showing an echinoi... view   view rock
view more images