Silexite | Article about silexite by The Free Dictionary
Chert occurring in calcareous beds.
Igneous rock composed mainly of primary quartz.
References in periodicals archive
The phosphate layers are separated by 0.3 to 1.3metre 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.