pressure shadow

pressure shadow

[′presh·ər ‚shad·ō]
(petrology)
In structural petrology, an area adjoining a porphyroblast, characterized by a growth fabric rather than a deformation fabric, as seen in a section perpendicular to the b axis of the fabric. Also known as pressure fringe; strain shadow.
References in periodicals archive ?
This site represents a highly prospective zone for mineralisation where the anastomosing structure splays from the granite intrusive creating a structural pressure shadow area in ductile sedimentary units.
PRESSURE Shadow Health Secretary Andy Burnham said: "When hospitals are under so much pressure, it makes no sense to close walk-in centres.