Heating rate (red) and cooling rate (blue) of the pebble filament heated by the lightning discharge shown in Fig. 6. The curves show, from top to bottom, the heating and cooling rate at optical depth τ = 0, 50, 100, 150, 200. The cooing rates lie at a few times 103 K h-1 in the first 100 seconds after heating terminates at theat = 2 × 103 s and subsequently fall to below 103 K h-1 over the next 1000 s. These cooling rates are in good agreement with the upper range of cooling rates inferred from chondrule textures (Hewins & Radomsky 1990).
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