Table 1.
Location | Aliquot | Radiometric age (Ma) | CRE age (Ma) | Interpretation |
---|---|---|---|---|
Cumberland | 4210 ± 350 (8.3%) | 78 ± 6 (7.7%) | Crystallization age of detrital minerals from basaltic precursor; mm to cm/Ma denudation by scarp retreat | |
Windjana | Aliquot 1 | 627 ± 50 (8.0%) | 145 ± 203 (140%) | Radiometric ages inaccurate due to incomplete degassing and/or mineralogic fractionation during sample handling |
Aliquot 2 | 1710 ± 110 (6.4%) | |||
Mojave 2 | Plagioclase | 4070 ± 630 (16%) | 300 (36Ar) to 1000 (3He) | Crystallization age of detrital minerals from basaltic precusor; pre-burial exposure |
Jarosite | 2120 ± 360 (17%) | Fluid flow through the Murray bedrock |
Ma, millions of years before present.