silexite

silexite

[sī′lek‚sīt]
(geology)
Chert occurring in calcareous beds.
(petrology)
Igneous rock composed mainly of primary quartz.
References in periodicals archive ?
3metre thick beds compact marl with silexite (silica nodules) and limestone that grade less that 5% of less P2O5.
Quelques nouveaux acritarches des silexites du Tremadocien superieur de la region de Kielce (Montagne de Ste.