Lake-sediment cores collected from IRI lakes

Coring teams from the University of Minnesota, USGS-Denver and USGS-Reston, under the direction of Herb Wright from the Limnological Research Center at the Univ. of MN, collected cores from Steel Lake, Little Shingobee Lake, and Crystal Lake March 17-20. Cores were varved throughout in Steel Lake, which was the condition hoped for prior to the coring expedition. The coring crew was grateful for the cold weather that occurred just prior to the trip. Ice had been melting rapidly from area lakes, and moats of open water were widening until cold conditions returned to the northland to firm up the ice. Information from these cores will be used to determine changes in climate at the site during the past 10,000 years or so, and to determine changes in lake stage in response to these climate changes.

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