The principle of intrusive relationships concerns crosscutting intrusions. Mantle plume hypotheses may rely on identifying mafic and ultramafic intrusions and coeval basalt volcanism. This sediment uplift was accompanied by igneous intrusions and volcanism. The emplacement of igneous intrusions tends to deform the surrounding country rock. Their efforts work to protect institutions, such as banks, from intrusions and information breaches. These metals occur associated with ultramafic intrusions and placer deposits derived from those intrusions. Much of the lower continental crust is metamorphic, except for recent igneous intrusions. Some of the igneous intrusions have the shapes of laccoliths. Such folding is also a feature of many igneous intrusions and glacier ice. Many kimberlite structures are emplaced as carrot-shaped, vertical intrusions termed "pipes". Ring fractures serve as feeders for fault intrusions which are also known as ring dikes. It protects a person, area, or object from attacks or intrusions. There is also an area of dolerite intrusions. Most of the intrusions were detected by American intelligence agencies. Some IDS products have the ability to respond to detected intrusions.