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Related to igneous rock: Intrusive igneous rock
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Frost and Frost (2008) devised a means of classifying alkaline igneous rocks and comparing their geochemistry with "normal" granitic rocks based a plot of alkalinity index (AI) versus feldspathoid silica saturation index (FSSI) (refer to Fig.
This age also suggests that some of the granitic clasts incorporated into the Del Raton Formation conglomerates come from the erosion of early Carboniferous igneous rocks related to Chanic magmatism.
86]Sr ratios throughout the newly crystallized igneous rock mass because of variation in mineral abundances.
Black lava and glassy obsidian (ob-sid-i-an) are igneous rocks.
Resistate, igneous rock indicator mineral grains in the current river system are probably derived at least in part from 'reworking' of the early Quaternary 'fanglomerate' gravels.
Heritage Centre spokes-woman Lorna Dirveiks said there must have been volcanoes in the area because Mancetter Quarry is one of the few sources of igneous rock - formed when lava solidifies - in the Midlands.
Five specimens (ROM 107911, ROM 107912, ACUNHC 302, ACUNHC 375 and ACUNHC 376) were collected from an isolated igneous rock outcrop within savanna.
Igneous rock has a high level of electrical resistance, which encourages geomagnetically induced currents to flow in the power-transmission lines situated above the rock.
Olivine occurs in an ultra-basic igneous rock called dunite.
All of the phosphorus found in sedimentary formations or deposits is derived from the weathering of igneous rock during geologic time.
They were searching for peaks made out of basalt, an igneous rock that also makes up the tips of known volcanoes that push through to the surface.