Rocks have growth rings too and they can help us learn about past climates

ENN
Feb 14, 2016, 7:23 am28 pts
Scientists have found a new way to tease out signals about Earth's climatic past from soil deposits on gravel and pebbles, adding an unprecedented level of detail to the existing paleoclimate record and revealing a time in North America's past when summers were wetter than normal.A research team led by soil…

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