A large igneous province lip is an extremely large accumulation of igneous rocks including intrusive sills dikes and extrusive lava flows tephra deposits arising when magma travels through the crust towards the surface. What are large igneous provinces earth history is punctuated by short duration events or dramatic pulses in longer duration events during which large volumes of mainly mafic magmas were generated and emplaced by processes unrelated to normal sea floor spreading and subduction. The high arctic large igneous province halip is a cretaceous large igneous province in the arctic the region is divided into several smaller magmatic provinces svalbard franz josef land sverdrup basin amerasian basin and northern greenland are some of the larger divisionstoday halip covers an area greater than 1000000 km 2 390000 sq mi making it one of the largest and most . Cambridge core structural geology tectonics and geodynamics large igneous provinces by richard e ernst. 333 large igneous provinces millard f coffin institute for geophysics the university of texas at austin 4412 spicewood springs rd suite 600 austin texas 78759 8500 plate tectonic theory has provided a breakthrough in understanding how the continuous opening and closing of ocean basins reflects convection in the earths upper mantle
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