Intrusion

Science / Geology / Intrusion: A igneous rock body that formed from magma that forced its way into, through or between subsurface rock units.

Lopolith

Science / Geology / Lopolith: A large laccolith that is bowl-shaped and depressed in the center, possibly by subsidence of an emptied magma chamber beneath the intrusion. MORE

Intrusive R

Entertainment / Literature / Intrusive R: A type of linguistic intrusion in which the letter [r] appears in an etymologically unexpected location, such as as between two words in which one ends in a vowel and the next word begins in a vowel. MORE

Encroachment

Entertainment / Football / Encroachment: If a player (besides the center) is in the neutral zone and contact occurs prior to the snap; a foul punishable by a 5-yard penalty. MORE

High Water Mark

Science / Tides and Currents / High Water Mark: A line or mark left upon tide flats, beach, or along shore objects indicating the elevation of the intrusion of high water. The mark may be a line of oil or scum on along shore objects, or a more or l MORE

Laccolith

Science / Geology / Laccolith: An igneous intrusion that has been forced between two layered rock units. The top of the intrusion is arched upwards and the bottom of the intrusion is nearly flat. MORE

Kimberlite

Science / Geology / Kimberlite: A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle. Many diamond deposits are found in kimberlite pipes. MORE

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