They're not briquettes, but they'll do | Science News



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They're not briquettes, but they'll do

10:11am, May 16, 2001

Chunks of 360-million-year-old fossil charcoal found in sediments in north-central Pennsylvania provide the earliest evidence yet that wildfires swept ancient landscapes.

Road construction exposed a 1-meter-thick layer of siltstone containing several layers of charcoal chunks, most 1.5 centimeters or less in length. Although the chunks had been entombed millions of years ago, they are still brittle and have a silky sheen. The charcoal leaves black marks when rubbed on paper, says Walter L. Cre

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