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Text Description: Basalt. A light brownish-gray (5YR 5/1) rock, with seriate texture and numerous flattish, irregular vesicles. The larger plagioclase crystals, ranging in size from 4 to 0.1 mm, have a median composition of about An80. The dark-green salite has a maximum size of about 3 mm with a maximum index of 1.690, suggesting a composition near Ca50Mg30Fe20. Small amounts of "basaltic" hornblende, pleochroic in red-brown and yellow colors and with wide resorption borders of magnetite, are also present. The groundmass consists of plagioclase laths, rods of augite, granules of magnetite or ilmenite, and interstitial glass in small amount. Small prisms of apatite and irregular grains of magnetite or ilmenite are the principal accessory minerals. References: ![]() |
StationID | Latitude | Longitude | Geologist | DateVisited | Age Info | Volcano | Eruption | Location Description | Text Description | Sample ID | Sample Type 1 | Sample Type 2 | Final Unit | Material | SiO2 | TiO2 | Al2O3 | FeOT | MnO | MgO | CaO | Na2O | K2O | P2O5 | Total-majors | REF majors | METH majors | Fe2O3/Fe203T orig | FeO/FeOT orig | Volatiles csv | METH volatiles | Cs | Rb | Ba | Sr | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Y | Zr | Nb | Hf | Ta | Pb | Th | U | Sc | V | Cr | Fe | Co | Ni | Cu | Zn | Ga | Mo | As | Na | K | Ref trace1 | METH trace1 | Rb | Ba | Sr | La | Ce | Nd | Sm | Eu | Gd | Dy | Er | Yb | Lu | Y | Zr | Nb | Pb | Th | U | Sc | Ti | V | Cr | Ni | Cu | Zn | Ga | Ref trace2 | METH trace2 | Light csv | Halogen csv | other major csv | other lile csv | other ree csv | other hfse csv | other hpe csv | other tm csv | other misc csv | |
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46AC21 | 51.9898 | -176.58705 | Unknown, Unknown | 1946-01-01 | Adagdak | From dome about 6,350 feet south 51 degrees east of summit of Mt. Adagdak. | Basalt. A light brownish-gray (5YR 5/1) rock, with seriate texture and numerous flattish, irregular vesicles. The larger plagioclase crystals, ranging in size from 4 to 0.1 mm, have a median composition of about An80. The dark-green salite has a maximum size of about 3 mm with a maximum index of 1.690, suggesting a composition near Ca50Mg30Fe20. Small amounts of "basaltic" hornblende, pleochroic in red-brown and yellow colors and with wide resorption borders of magnetite, are also present. The groundmass consists of plagioclase laths, rods of augite, granules of magnetite or ilmenite, and interstitial glass in small amount. Small prisms of apatite and irregular grains of magnetite or ilmenite are the principal accessory minerals. | 46AC21 | Lava | Whole-rock | 53.27 | 0.56 | 19.14 | 8.28 | 0.18 | 3.68 | 10.07 | 3.37 | 0.93 | 0.31 | 100.22 | 1085 | NN | 8.18 | 0.87 | H2OP=0.1; H2OM=0.1 | NN | units are percent 0.02 | units are percent 0.08 | units are percent 0 | units are percent 0.004 | units are percent 0 | 0.02 | units are percent 0.0004 | 0.001 | units are percent 0.008 | units are percent 0.004 | units are percent 0.001 | units are percent 0 | units are percent 0 | 1085 | SPEC |
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