xenoliths

Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 19
by James St. John

Lamprophyre dike & hornfels & country rock (Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 3
by James St. John

Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 30
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 12
by James St. John

Serpentinite (New Idria Serpentinite, Middle Miocene, ~14 Ma; Green Fire Mine, California, USA) 8
by James St. John

Porphyritic rhyodacite (Holocene; Chaos Jumbles Landslide, Lassen Volcano National Park, California, USA) 4
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 11
by James St. John

Lamprophyre (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 7
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 8
by James St. John

Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 4
by James St. John

Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 1
by James St. John

Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 2
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 9
by James St. John

Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, USA) 7
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 2
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 11
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 13
by James St. John

Monchiquite lamprophyre dike (Precambrian; Michipicoten River Bridge South roadcut, south of Wawa, Ontario, Canada) 1
by James St. John

Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, USA) 23
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 3
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 6
by James St. John

Sandorite lamprophyre (Sandor Dike, Neoarchean, 2.703 Ga; Route 17 roadcut northeast of Wasp Lake & north of Wawa, Ontario, Canada) 8
by James St. John

NW DuToit Mtns asymmetric xenoliths in quartz tonalite
by euphro

Vesiculated olivine orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Vesiculated orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 3
by James St. John

Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, USA) 14
by James St. John

Heterolithic volcanic breccia (Cripple Creek Diatreme, Early Oligocene, ~32 Ma; Squaw Gulch roadcut, Cripple Creek Mining District, Colorado, USA) 1
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 8
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 9
by James St. John

2016-12-05_15-25-36_Nikon_JH
by Juhele_CZ

Orendite lamproite talus (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 3
by James St. John

Vesiculated orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 4
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 4
by James St. John

Quenched blobs in pinkish-reddish porphyritic dacite (Upper Pleistocene, 27 ka; Devastated Area, Lassen Volcano National Park, California, USA) 7
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 7
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 7
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 6
by James St. John

Boulders of orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 11
by James St. John

Porphyritic rhyodacite (Holocene; Chaos Jumbles Landslide, Lassen Volcano National Park, California, USA) 2
by James St. John

Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 2
by James St. John

Lamprophyre (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 5
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 2
by James St. John

Lamprophyre breccia (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 3
by James St. John

Olivine orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 2
by James St. John

Vesiculated orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 2
by James St. John

Boulders of orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 9
by James St. John

Orendite lamproite talus (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Boulders of orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 10
by James St. John

Lamprophyre (Dubreuilville Dike, Archean; Route 17 roadcut southeast of Princess Lake & north of Wawa, Ontario, Canada) 6
by James St. John

Boulders of orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 8
by James St. John

Boulder of orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 2
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 5
by James St. John

Pumiceous orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 10
by James St. John

Orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Olivine orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 1
by James St. John

Olivine orendite lamproite (Pleistocene, 1.30-1.37 Ma; Black Rock volcanic center, Leucite Hills, Wyoming, USA) 3
by James St. John

Micaceous kimberlite (Stockdale Diatreme, Cretaceous; Riley County, Kansas, USA) 9
by James St. John

Mount Eissenger xenoliths in orthogneiss (close-up)
by euphro