Latest posts tagged with #dunite on Bluesky
Dunite and troctolite xenoliths hosted by hawaiitevand closeup of dunite olivines
Laupāhoehoe Volcanics, Mauna kea
#geology #geoscience #volcano #hawaii #maunakea #xenolith #peridotite #dunite #troctolite #olivine
Dunite xenoliths in picrite, Koʻolau. Due to their high density and low viscosity, picrites are the only tholeiitic melts that can carry ultramafic xenoliths to the surface. In Hawaiʻi, these are usually crustal cumulates of tholeiitic affinity.
#xenolith #dunite #geology #geoscience #picrite
Peridotite and clinopyroxenite mantle xenoliths
Moanalua vent, Honolulu Volcanics, Koʻolau, Oʻahu, Hawaiʻi
#geoscience #geology #dunite #volcanology #volcano #mantle #xenolith #xenocryst #peridotite #Hawaii #pyroxenite
Clinopyroxenite and dunite xenoliths
Kolekole Member of the Waiʻanae Volcanics
Waiʻanae, Oʻahu
#xenolith #clinopyroxenite #pyroxenite #volcano #geology #geoscience #dunite #peridotite
Peridotite (dunite) mantle xenolith and clinopyroxene xenocrysts hosted in melilite nephelinite tuff.
Moanalua vent, Honolulu Volcanics, Koʻolau, Oʻahu, Hawaiʻi
#geoscience #geology #dunite #volcanology #volcano #mantle #xenolith #xenocryst #peridotite #Hawaii #clinopyroxene
This Blue Ridge Ophiolite spinel dunite originated via a metasomatic reaction causing good old opx assimilation in #harzburgite forming #dunite channels in what was once an extremely slow-moving spreading center. Extreme deformation of the Appalachians stretched these #peridotite lenses and pods.
Cumulate #ultramafic #xenoliths ( #dunite & #spinel ± #plagioclase #peridotite) of the #Hualālai Volcanics with @volcanoesinthesea.bsky.social
