Looking for Lightning

The Daily Plasma

Re-posted courtesy of Thunderbolts.info
One thing you can say about lightning – it’s not very subtle.

Geomorphologist Stephan Grab and Geologist Jasper Knight at Johannesburg’s University of the Witwatersrand in South Africa have studied the Drakensberg Peaks in Lesotho and discovered the primary force shaping them is lightning.  They studied 90 sites where lightning blasted away basalt rock faces, leaving pits up to three feet deep and scattering ten tons of debris. They found lightning shifted boulders as big as small trucks.

Their research is published in the January 1, 2015 issue of Geomorphology. Their findings contradict the standard belief that ice and heat are the main forces shattering rocks on the Drakenberg summits.

Lightning can generate temperatures over 52,000 ºF (30,000 ºC.) Hot enough to create an explosion, instantly melting basalt and vaporizing water in rock pores and fissures.

Lightning may be positive, or negative in polarity, depending on…

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