Ann: Caldeira Project Drilling Update, page-70

One part of the Announcement which has not really been talked about is the primary mineralization.
"Beneath the clay zone, in the partially weathered and fresh syenite (basement), all REE elements are likely related to primary mineralisation and consequently are not a target for the Company."

Perhaps one day if somebody decided to sink a few holes at depth into the basement there could possibly be a hard rock deposit also. I completely understand that the companies focus is on the clays first and foremost but could certainly add an extra dimension to the project in time.