- Associated Press - Tuesday, September 23, 2014

OSKALOOSA, Iowa (AP) - Researchers have resumed digging after a two-month hiatus at a site where mammoth bones were found in southern Iowa’s rural Mashaka County.

Wet weather had prevented excavation of the site where scientists in June discovered the bones while cleaning up mud and other debris, the Oskaloosa Herald reported (https://bit.ly/1ogQHpl ).

Digging restarted over the weekend, with archeologists, their family members and some Indian Hills Community College Science Club members searching for clues on how the mammoth remains came to rest in Mashaka County.

Archeologist Joe Artz said he and his wife examined layers of sediment that volunteers uncovered on the site’s walls to see what has accumulated over time.

“Just seeing the profiles, different layerings, are really useful to know,” Artz said.

On the site’s northeast side, Artz said there was a bog where mammoths may have come to get a drink of water. He said the animals may have gotten caught in it, drowned and were later buried.

But mammoth bones were found in a different location at the site, in sand and gravel deposits that were higher up than the bog. Dave Brenzel of the Indian Creek Nature Center said the bones most likely had shifted to that location.

Cathy Copeland of the Indian Hills Science Club came Saturday to work at the site. She said it was the first time she was able to visit and see the excavation site.

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Information from: The Oskaloosa Herald, https://www.oskaloosaherald.com

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