Table S1. APXS chemical compositions of drill samplesa,,,,,,,Table S2. Unit-cell parameters and calculated chemical formula for plagioclase feldspar and hematite,,,,,,,,,,,,,,,,Table S3. Bulk phase distributions normalized to the minimum amorphous abundance as determined from mass balance calculationsa,,,,,
,Oudam,Marimba,Quela,Sebina,,,,Plagioclase,,,,,,,,,,,,,,,,Bulk Phase Distributions,,,,
sol,1368,1426,1466,1533,,,,a (Å),b (Å),,c (Å),,a (°),,? (°),,? (°),,chemical formula,,,,,Oudamb,Oudamc,Marimba,Quela,Sebina
SiO2,51.82,45.99,44.81,43.74,,,Oudam,8.163(5),12.852(7),,7.110(4),,93.52(4),,116.31(4),,90.05(5),,(Ca0.40(7)Na0.60)(Al1.40Si2.60)O8,,,,Crystalline,54,48,25,40,41
TiO2,1.05,1.07,1.05,1.01,,,Marimba,8.161(8),12.849(7),,7.111(6),,93.41(6),,116.30(4),,90.09(3),,(Ca0.39(5)Na0.61)(Al1.39Si2.61)O8,,,,Clay Minerals,3,3,22,21,25
Al2O3,9.4,8.49,8.48,8.3,,,Quela,8.175(7),12.845(8),,7.118(7),,93.43(5),,116.39(6),,90.06(4),,(Ca0.39(6)Na0.61)(Al1.39Si2.61)O8,,,,Opal-CT,7,--,0,0,0
Cr2O3,0.32,0.33,0.29,0.35,,,Sebina,8.174(7),12.857(14),,7.116(7),,93.44(5),,116.28(7),,90.10(8),,(Ca0.42(6)Na0.58)(Al1.42Si2.58)O8,,,,Min. Amorphous,36,49,53,39,34
FeOT,18.74,22.53,18.93,18.59,,,,,,,,,,,,,,,,,,,Total,100,100,100,100,100
MnO,0.22,0.09,0.22,0.19,,,,Hematite,,,,,,,,,,,,,,,aOxides and Cl are reported in wt %,,,,,
MgO,4.9,4.58,4.1,4.76,,,,a (Å),b (Å),,c (Å),,a (°),,? (°),,? (°),,,,,,bOpal-CT considered a crystalline phase in amorphous composition calculations,,,,,
CaO,4.55,5.27,7.48,7.54,,,Oudam,5.029(1),5.029(1),,13.738(3),,90,,90,,120,,,,,,bOpal-CT considered an amorphous phase in amorphous composition calculations,,,,,
Na2O,2.59,2.11,2.19,2.26,,,Marimba,5.029(1),5.029(1),,13.742(4),,90,,90,,120,,,,,,,,,,,
K2O,0.87,0.83,0.77,0.72,,,Quela,5.031(2),5.031(2),,13.755(7),,90,,90,,120,,,,,,,,,,,
P2O5,0.52,1.05,1.1,0.67,,,Sebina,5.030(2),5.030(2),,13.748(6),,90,,90,,120,,,,,,,,,,,
SO3,4.36,6.78,9.3,10.58,,,,,,,,,,,,,,,,,,,,,,,,
Cl,0.35,0.48,1.01,1.05,,,,,,,,,,,,,,,,,,,,,,,,
Total,99.69,99.6,99.73,99.76,,,,,,,,,,,,,,,,,,,,,,,,
aOxides and Cl are reported in wt %,,,,,,,,,,,,,,,,,,,,,,,,,,,,