LISTVENITE AND RELATED ROCKS - PERSPECTIVES ON TERMINOLOGY AND MINERALOGY WITH REFERENCE TO AN OCCURRENCE AT CREGGANBAUN, CO MAYO, REPUBLIC-OF-IRELAND

The rock 'listvenite' is named and defined by ;reference to historical , observations and recommendations are made so that listvenite (s.s.) can be distinguished from related carbonate-rich alteration products o f ultramafic rocks. The mineralogy and tectonic setting of listvenite are reviewed, taking into account the descriptions and classifications used in the literature. The petrography of listvenite and related roc ks at Cregganbaun serves as a reference to illustrate the characterist ics of true listvenite and closely related products of listvenitic alt eration.