Of char and carbon: The story of a buried soil

The so-called Brady soil — a dark horizon up to a meter thick that underlies much of Kansas and Nebraska — is widespread but often unseen. The layer is a paleosol, or fossil soil, that formed about 15,500 to 13,500 years ago when the region was a stable grassland built atop dunes of thick, wind-blown loess. That changed when the Laurentide Ice Sheet retreated and dunes swallowed the grasslands.

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Allison Mills

Allison Mills

Mills works as a science and technology writer for Michigan Tech, moonlighting as a freelancer and dance instructor. She earned her master's in environmental science and natural resource journalism at the University of Montana and studied geoscience as an undergrad at Northland College. She considers herself a radio geek and occasional rock licker. 

Monday, September 22, 2014 - 20:00