Mastodon Fossil Finds in Indiana, Michigan

Mine workers in southwestern Indiana have unearthed the tusks and skeletal remains of a prehistoric elephant that lived more than 12,000 years ago.

The workers were digging a coal slurry storage pit recently at Vectren's Black Panther Mine about 30 miles south of Terre Haute when they noticed the fossil mastodon bones in a backhoe shovel.

After realizing the importance of the find, the crew notified the Indiana Division of Reclamation, which regulates mining operations.

Division of Reclamation archaeologist Tim Wright praised the workers for saving the fossils of the prehistoric elephant and contacting the state.

"It's just an accident they ran into it and they did the right thing by notifying us," Wright said.

He said the bones include pieces of ribs, skull, tusks and a kneecap. The fossilized remains have been turned over to the Indiana State Museum for further study and preservation.

Wright said Vectren has set aside the dirt in which the fossils were found. Paleontologists from the state museum have conducted more searches for additional remains.

[...]

Last month, a couple in central Michigan found the bones of a 10,000-plus-year-old mastodon. Rich and Annette Schneider planned to put a pond in their backyard in Portland, Mich. and the dig turned up bones including a leg, a rib and a tusk.

I wonder how accurate that 10k yo dating is.