| http://www.w3.org/ns/prov#value | - While it is generally agreed that there was a decrease in the impact rate after 3.8 Ga, it is still unsettled whether a) there was an anomalously high flux ~3.9 Ga, b) if there was a high flux ~3.9 Ga, how long it lasted, and c) whether the impact rate between ~4.4 and ~4.0 was relatively high or low.
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