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. 2021 Jan 15;7(3):eaba9428. doi: 10.1126/sciadv.aba9428

Table 1. Rock samples studied and their composition.

Hawaii alkali
olivine
basalt 		Idaho
Columbia
River basalt 		Lathrop Wells,
NV
trachybasalt 		Kilauea
fresh
basaltic
glass 		Basalt
Holyoke 		Mount St.
Helens
andesite 		Dacite Black
Butte 		Vinalhaven,
Maine granite 		Basalt Lake
Yojoa,
Honduras 		Rhyolite
Seiser Alm,
Italy 		Basalt Seiser
Alm, Italy 		Basalt
Lanzarote
Island,
Spain
Collection of
M. McCanta,
Univ. of
Tennessee
Knoxville		 Collected for
this project
in Moscow,
Idaho by
M. Gunter,
Univ. of
Idaho		 Collection of
M. Rutherford,
Brown
University,
sample LW-A		 Collected by
T. Orr, Hawaii
Volcano
Observatory		 Collected in
East Granby,
CT from
Lower
Jurassic
basalt in the
Newark
Supergroup,
MA		 Collection of
M. McCanta,
Univ. of
Tennessee
Knoxville		 Collection of
M. McCanta,
Univ. of
Tennessee
Knoxville		 Collection of
S. Seaman,
Univ. of
Massachusetts
Amherst		 Collection of
S. Mertzman,
Franklin and
Marshall
College		 Collections
of University
of Padua		 Collections of
University of
Padua		 Collections
of University
of Padua
Slab Slab Slab Powder: 700
to 1000 μm		 Slab Slab Slab Powder: 700 to
1000 μm		 >500 μm; 250
to 500 μm		 Slab Slab Slab
Na2O 2.74 2.48 2.97 2.49 2.79 4.59 4.39 3.25 3.10 2.23 3.21 3.12
MgO 4.88 5.25 5.11 6.68 5.46 2.17 2.22 0.39 6.74 0.47 7.13 9.13
SiO2 45.81 48.56 40.02 51.56 51.92 62.27 63.96 75.26 47.62 77.93 50.06 46.83
Al2O3 14.36 13.36 14.02 13.98 13.66 17.96 17.74 12.70 18.13 11.81 13.24 12.92
K2O 0.88 1.15 1.52 0.44 0.70 1.23 1.14 5.00 1.06 5.29 2.45 1.04
CaO 10.09 8.96 16.05 10.93 9.33 5.41 5.53 0.89 10.11 0.17 8.89 10.51
TiO2 2.14 3.11 1.72 2.50 1.04 0.66 0.45 0.30 2.04 0.08 0.95 2.99
MnO 0.18 0.30 0.16 0.17 0.21 0.08 0.06 0.07 0.16 0.01 0.22 0.17
FeO* 12.64 14.01 9.36 11.24 12.11 4.37 3.47 1.74 9.18 1.31 12.27 11.40
P2O5 0.29 0.78 1.10 0.24 0.13 0.14 0.15 0.07 0.45 0.01 0.30 0.53
Total 94.01 97.96 92.03 100.06 97.35 98.88 99.11 99.60 98.59 99.40 98.72 98.64