intrusion

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Related to Intrusive Rock: Intrusive igneous rock

intrusion

[in·tro̅o̅′zhən]
Etymology: L, intrudere, to push or force in
an orthodontic technique of depressing a tooth back into the occlusal plane or attempting to prevent its eruption or elongation during correction of an excessive overbite. Compare extrusion (def. 3).

intrusion,

n a depression; an inward projection.

intrusion

an orthodontic procedure in which a tooth is made to move further into the alveolus.
References in periodicals archive ?
The only reported Fe-Ti-V deposit associated with mafic intrusive rocks is located in the Kogaluk Bay area (Maurice et al.
8 Km) northeast of Cretaceous quartz/granite porphyry intrusive rocks historically explored for molybdenum and copper in the Spruce Mountain Mining District.
Sedimentary rocks are heavily iron oxide stained and fractured in the hornfelsed zones adjacent to and along margins of the intrusive rocks.
Recognition of these intrusive bodies at Bailey Hills was previously hampered by post-mineralization volcanic cover rocks, but geophysical surveys have identified intrusive rocks and numerous high angle faults underlying the claim area.
Intrusive rocks occur as dikes, sills and small stocks and compositionally include diorites and granodiorites as well as rhyolites.
The geological setting of the La Reforma Mine is complex and consists of Mesozoic age, carbonate rich, meta-sedimentary and meta-volcanic rocks which are intruded by several phases of intrusive rocks from Cretaceous to Miocene time.
Along Rufin Kreek itself, a several hundred metre square surface area is currently being mined from the alluvial gravels up onto the surrounding hillsides where saprolitic intrusive rocks and quartz veinlets are exposed.
The surface program has been highly successful and is continuing to uncover porphyry intrusive rocks.
The primary target is PGM mineralization hosted by altered mafic volcanic and mafic intrusive rocks, and chemical sediments.
From this work, the company is pleased to confirm the discovery of porphyry style copper and gold mineralization associated with porphyritic intrusive rocks.
Mineralization consists of chalcopyrite and bornite with secondary covellite and chalcocite, hosted within gabbroic intrusive rocks associated with a major regional fault system.
In addition, two additional holes were designed to evaluate previously encountered reverse circulation drilling results from intrusive rocks of the Dolphin stock which returned 50.