During the interval
in question (2,300–1,000 Ma), it even can be
argued that continental weathering reached a peak
at around 1,900 Ma (Shields 2007), and that freshwater
and coastal marine habitats had unique access
to Zn, Cu, and Mo from the weathering of granites
and sulfides shortly thereafter (Parnell et al. 2012).
During the intervalin question (2,300–1,000 Ma), it even can beargued that continental weathering reached a peakat around 1,900 Ma (Shields 2007), and that freshwaterand coastal marine habitats had unique accessto Zn, Cu, and Mo from the weathering of granitesand sulfides shortly thereafter (Parnell et al. 2012).
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