Some Quaternary Rocks
Magadi Trachyte (a.k.a. Plateau Trachyte) - Lower to Middle
Pleistocene (~700 ky to ~1.4 Ma) vesicular porphyritic trachyte, a flood lava
at Lake Magadi, East African Rift Valley, Kenya.
Monturaqui Impactite - <1 Ma impactite from the Monturaqui Impact
Crater, Atacama Desert, Chile.
Mt. Kenya volcanic rocks - Pleistocene kenyte (left) & porphyritic
anorthoclase phonolite (center) & porphyritic nephiline syenite (right)
from Mt. Kenya Volcano, East African Rift Valley, Kenya.
Ol Doinyo Nyukie volcanic lava - Quaternary trachyte obsidian erupted from Ol Doinyo
Nyukie, Mt. Suswa Caldera, East African Rift Valley, Kenya.
Australasian Tektite Strewn Field - ~656-755 Ma indochinite tektite from Guangdong
Province, China (left) & billitonite tektites (right) from Belitung Island,
Indonesia.
Peridot Mesa Flow - 580 ky olivine basanite with mantle xenolith of
lherzolite from Peridot Mesa, Arizona, USA.
Erebus volcanic lava phenocrysts - Upper Pleistocene or Holocene anorthoclase
phenocrysts from kenyte lava at Mt. Erebus Volcano, Ross Island, Antarctica.
Anastasia Formation - coquinoid quartzose sandstone with geodized Busycon
gastropod (left) and bivalve shells (right) from the Upper Pleistocene (~125
ky) at Indrio Pit, Fort Pierce, Florida, USA.
Cockburn Town Member of the Grotto Beach Formation - ~125 ky fossiliferous limestone from San Salvador
Island, Bahamas.
Odessa Breccia - 64 ky impact breccia from Odessa Crater, Texas,
USA.
Volkhovites - 10 to 65 ky impact microtektites or cryptovolcanic airfall glasses
from the Volkhov River, Russia.
Lonar Impactite - ~52 ky basaltic impactite from the Lonar Impact
Crater, India.
Green Beds (a.k.a. High Magadi Beds) - lacustrine chemical chert (gray) between erionite
siltstones (pale green) from the upper Upper Pleistocene (40 ky) at Lake Magai,
East African Rift Valley, Kenya.
Kilbourne Hole volcanic lava - 15-20 ky basalt with mantle xenolith of lherzolite,
erupted from the Kilbourne Hole Crater, New Mexico, USA.
Concretions - marlstone (lime-clay) concretions from near-latest Pleistocene lake
deposits (~11 ky) in the Abitibi area, Quebec, Canada.
Filmore Craters lava field - Holocene scoriaceous basalt erupted from Filmore
Craters, Sevier Desert, Utah, USA.
Kofelsite - ~9.8 ky impactite or frictionite from the Köfels Structure, Austria.
Kerið Crater volcanic lava - ~3 ky oxidized scoriaceous basalt erupted from the
Kerið Crater (Kerith Crater), Iceland Hotspot.
Yellowstone geyserite - Holocene siliceous sinter (geyserite) from the
Yellowstone Hotspot, Wyoming, USA.
Vesuvius volcanic pumice - August 79 A.D. phonolite pumice erupted from Mt.
Vesuvius, Pompeii, Italy.
Medicine Lake volcanic pumice - ~1065 A.D. airfall pumice erupted from Glass
Mountain eruptive center, Medicine Lake Volcano, California, USA.
Vesuvius volcanic lava - December 1631 porphyritic tephrite or phonolite
erupted from Mt. Vesuvius, Pompeii, Italy.
Krakatoa volcanic pumice - August 1883 rhyodacite pumice erupted from Krakatoa
Volcano, Indonesia.
Vesuvius volcanic lapilli - March 1944 airfall lapilli erupted from Mt.
Vesuvius, Pompeii, Italy.
Mauna Loa volcanic lava - 1949 scoriaceous basalt erupted from Mauna Loa
Volcano, Hawaii Hotspot.
Mt. Kilauea volcanic lava - February 1960 vesicular porphyritic olivine
basalt, erupted from the East Rift Zone of Kilauea Volcano, Hawaii Hotspot.
Ol Doinyo Lengai volcanic lava - 1963 natrocarbonatite erupted from Ol Doinyo Lengai
Volcano, East African Rift Valley, Tanzania.
Ol Doinyo Lengai volcanic ash - August-October 1966 natrocarbonatitic ash and
lapilli erupted from Ol Doinyo Lengai Volcano, East African Rift Valley,
Tanzania.
Mt. Kilauea volcanic lava - 1969 to 1974 sideromelane (external surface of lava
tube ceiling) erupted from the Mauna Ulu vent, East Rift Zone, Kilauea Volcano,
Hawaii Hotspot.
Mt. St. Helens volcanic ash - May 1980 dacite ash erupted from Mt. St. Helens,
Washington State, USA.
Grosbeak Lake Salt Flats - modern evaporitic halite from Grosbeak Lake,
Alberta, Canada.
Dead Sea halite - modern evaporitic halite snowball from the Dead Sea,
Israel.
Black smoker chimney rock - pre-November 1981 chalcopyrite-sphalerite-anhydrite
rock from a seafloor hydrothermal vent, East Pacific Rise.
Mt. Kilauea volcanic lava - early 1990s vesicular basalt with mafic
obsidian rim erupted from Kupaianaha, East Rift Zone of Kilauea Volcano, Hawaii
Hotspot.
Pinatubo volcanic ash - June 1991 dacite ash & lapilli & pumice
fragments erupted from Mt. Pinatubo Volcano, Phillipines.
Mt. Spurr volcanic ash - August 1992 hornblende andesite ash erupted from
Mt. Spurr Volcano, Alaska, USA.
Soufrière Hills volcanic ash - summer 1997 volcanic ash & lapilli erupted from
Soufrière Hills Volcano, island of Montserrat, Caribbean Sea.
Soufrière Hills volcanic lava - 1997 andesite erupted from Soufrière Hills Volcano,
island of Montserrat, Caribbean Sea. Light gray material on the left
= semi-vesicular, porphyritic hornblende andesite. Very light gray
material on the right = pumiceous porphyritic hornblende andesite.
Etna volcanic ash - November 2002 glassy trachybasaltic volcanic
ash erupted from Mt. Etna Volcano, Sicily.
Pacaya volcanic lava - December 2004 tachylite erupted from Pacaya
Volcano, Guatemala.
Soufrière Hills volcanic ash - February 2006 volcanic ash erupted from Soufrière
Hills Volcano, island of Montserrat, Caribbean Sea.
Merapi volcanic ash - June 2006 basaltic andesite ash erupted from Merapi
Volcano, Indonesia.
Home Reef volcanic pumice - August 2006 dacite pumice erupted from the
Home Reef Volcano, Tonga Islands, southwestern Pacific Basin.
Jabal al-Tair volcanic lava - September-October 2007 basaltic tachylite
erupted from the Jabal al-Tair Volcano, Red Sea.
Chaitén volcanic ash - May 2008 rhyolitic volcanic ash erupted from
Chaitén Volcano, southern Chile.