Sample: 46AC275
| Sample ID: | 46AC275 [1] | ||||||||||||
| Station ID: | 46AC275 | ||||||||||||
| AT Num: | |||||||||||||
| Volcano: | Moffett | ||||||||||||
| Possible source: | |||||||||||||
| Eruption: | |||||||||||||
| Collector: | Unknown, Unknown | ||||||||||||
| Date sampled: | 1946-01-01 | ||||||||||||
| Sample type 1: | Lava | ||||||||||||
| Color: | medium light-gray | ||||||||||||
| Final unit: | |||||||||||||
| Text Description: | Medium light-gray (N5) olivine-hypersthene basalt, with seriate pilotaxitic texture and dense structure. Plagioclase crystals, as much as 3 mm in size, have a median composition of about An75 for the larger crystals and show strong zoning. The salite grains, which reach a maximum size of 1 mm, have nZ 1.73, nX 1.692, and 2V 60 degrees, suggesting a composition of Ca50Mg[?]-[?]Fe15-30. The crystals are visibly zoned, with the higher index material on the outside; the highest and lowest indices obviously do not represent the same material. The highest index measured for hypersthene was 1.699, suggesting a composition of En74Fs26. The olivine, which attains a maximum size of 0.5 mm, has nZ 1.699, corresponding to Fa15. Magnetite in irregular grains up to 0.1 mm, and apatite, in pseudodichroic prisms, are the principal accessories. Orthoclase (?) was apparently the last mineral to crystallize. | ||||||||||||
| Sample Location: |
       88 159 80 133 111 7 25 120 Akutan Aniakchak Atka volcanic complex Augustine Cleveland Dutton Edgecumbe Fisher Gareloi Great Sitkin Griggs Iliamna Isanotski Kanaga Katmai Little Sitkin Mageik Makushin Martin Novarupta Pavlof Redoubt Semisopochnoi Shishaldin Snowy Spurr Takawangha Tanaga Trident Ugashik-Peulik Ukinrek Maars Veniaminof Westdahl Wrangell Adagdak Addington volcanic field Alagogshak Amak Amchixtam Chaxsxii Amukta Andrew Bay volcano Basalt of Gertrude Creek Behm Canal-Rudyerd Bay Black Peak Bobrof Bogoslof Buldir Buzzard Creek Camille Cone Capital Carlisle Chagulak Chiginagak Churchill, Mt Cone 3110 Cone 3601 Dana Davidof Denison Devils Desk Double Glacier Douglas Drum Duncan Canal Emmons Lake Volcanic Center Espenberg Folsoms Bluff Fourpeaked Frosty Gas Rocks, the Gilbert Gordon Gosling Cone Hayes Herbert Imuruk Lake Volc Field Ingakslugwat Hills Ingenstrem Depression Volcanic Field Ingrisarak Mtn Iron Trig cone Iskut-Unuk River cones Jarvis Jumbo Dome Kagamil Kaguyak Kasatochi Kejulik Kialagvik Kiska Klawasi Group Knob 1000 Kochilagok Hill Koniuji Kookooligit Mountains Koyuk-Buckland volcanics Kukak Kupreanof Lone basalt Maclaren River volcanic field Moffett Monogenetic QT vents of WWVF Morzhovoi Nelson Island Nunivak Island Nushkolik Mountain volcanic field Okmok Pavlof Sister Prindle Volcano Rainbow River cone Recheshnoi Roundtop Sanford Seguam Segula Sergief Skookum Creek St. George volcanic field St. Michael St. Paul Island Steller Stepovak Bay 1 Stepovak Bay 2 Stepovak Bay 3 Stepovak Bay 4 Suemez Island Table Top Mtn Tanada Peak Tanax̂ Angunax̂ Tlevak Strait Togiak volcanics Uliaga Ungulungwak Hill-Ingrichuak Hill Unnamed (near Ukinrek Maars) Vsevidof Western Cones Wide Bay cone Yantarni Yunaska Legend ✕
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