(of igneous rock) composed of a very high percentage of magnesium and iron
Examples of 'ultramafic' in a sentence
ultramafic
Ultramafic outcrops harbour diverse vegetation types and remarkable plant diversity.
Véronique Gourmelon, Laurent Maggia, Jeff R Powell, Sarah Gigante, Sara Hortal, ClaireGueunier, Kelly Letellier, Fabian Carriconde 2016, 'Environmental and Geographical Factors Structure Soil Microbial Diversity in New CaledonianUltramafic Substrates: A Metagenomic Approach.', PLoS ONEhttp://europepmc.org/articles/PMC5131939?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The ultramafic body has undergone regional metamorphism and recrystallization.
H. Papunen 1980, 'The Kylmäkoski nickel-copper deposit in south-western Finland', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume52/sgs_bt_052_1_pages_129_145.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This hypothesis explains the volcanological paradox of large explosive eruptions produced by ultramafic magmas.
Alessandra Correale, Vittorio Scribano, Antonio Paonita 2019, 'A Volcanological Paradox in a Thin-Section: Large Explosive Eruptions of High-Mg MagmasExplained Through a Vein of Silicate Glass in a Serpentinized Peridotite Xenolith(Hyblean Area, Sicily)', Geoscienceshttps://www.mdpi.com/2076-3263/9/4/150. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Similar patterns can be expected in other mafic-ultramafic complexes, especially in layered intrusions.
A.Y. Barkov, A.A. Nikiforov, T.A.A. Halkoaho, J.P. Konnunaho 2016, 'The origin of spheroidal patterns of weathering in the Pados-Tundra mafic-ultramaficcomplex, Kola Peninsula, Russia', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume88/Bulletin_vol88_2_2016_Barkov.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The majority of the cores are dioritic, but some are ultramafic and rich in biotite.
V. Perttunen 1983, 'Orbicular quartz diorite in Kemi, NW Finland', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume55/sgs_bt_055_1_pages_051_056.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The lowest values for macronutrients appeared in the soils formed on ultramafic materials.
Ana Romero-Freire, José Antonio Olmedo-Cobo, José Gómez-Zotano 2018, 'Elemental Concentration in Serpentinitic Soils over Ultramafic Bedrock in Sierra Bermeja(Southern Spain)', Mineralshttp://www.mdpi.com/2075-163X/8/10/447. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Several thin chromitite layers have been intersected by drilling, all in the ultramafic unit.
K. Söderholm, O. Inkinen 1982, 'The Tornio layered intrusion - a recently discovered intrusion with chromitite horizonsin Northern Finland', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume54/sgs_bt_054_pages_015_024.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Serpentine ecosystems are developed on ultramafic outcrops which, although rare, have a worldwide distribution.
Andrés Vicente Pérez-Latorre, Noelia Hidalgo-Triana, Baltasar Cabezudo 2018, 'New data on the southern Iberian serpentinophyte flora (Andalusia, Spain)', Mediterranean Botanyhttp://revistas.ucm.es/index.php/MBOT/article/view/60080. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We consider the geological features of ultramafic rock and chrome ore deposits.
D. E. Saveliev, I. I. Musabirov 2018, 'Chromitites of the Akkarginskiy massif (the Southern Urals)', Vestnik Permskogo Universiteta: Seriâ Geologiâhttp://geology-vestnik.psu.ru/index.php/geology/article/view/231. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Both are compositionally zoned across the bodies from ultramafic to metagabbro.
J.F.H. Thompson, F. Nixon, R. Sivertsen 1980, 'The geology of the Vakkerlien nickel prospect, Kvikne, Norway', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume52/sgs_bt_052_1_pages_003_021.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)