structure sub-feuilletée

CONT: Le granite faiblement métamorphosé (...) a une structure sub-feuilletée et cataclastique due à la déformation des cristaux de quartz (...)

OBS: foliated structure: Used in a broad sense includes the textural or structural properties of certain rocks which permit then to be cleaved or parted along approximately parallel surfaces or lines.
OBS: sub-: A prefix denoting under, below, or less than.