lave amygdaloïde

OBS: Souvent [les] vacuoles se remplissent par des cristallisations secondaires, faites de calcite ou de zéolites et dont l'aspect en amande donne aux laves une texture amygdalaire.

CONT: At some stage after lava has solidified, the vesicles may be filled by a variety of secondary minerals, especially calcite and zeolites. The infilled vesicles are referred to as amygdales and the lavas containing them, amygdaloidal lavas....