I’m feeling a rush of what seems to be nostalgia: I’m sure it’s been ages since we saw such a classic example of an attempt to prove that the Earth is young via the use of an overly simplistic understanding of geological processes as we have here in Counting Earth’s Age in Lightning Strikes, by Brian Thomas.
But first a look at the research that prompted his article. Certain angular fracturing in exposed rocks – like in the above picture from northern Sweden – is commonly credited to the freeze-thaw cycle, with the expansion of water forming ice over winter acting to expand existing weaknesses. Other options do exist, but they all follow a similar theme. As Brian’s source paper, Lightning as a geomorphic agent on mountain summits: Evidence from southern Africa, says: Continue reading