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.

 


 

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