Popular Interest
1,500,000
Bags of rock chips in the IGS Rock Library
30
If put end to end, core samples in the IGS Rock Library would stretch 30 miles
470,000,000
IGS geologists determined that a meteor struck northeast Iowa 470M years ago
Bags of rock chips in the IGS Rock Library
If put end to end, core samples in the IGS Rock Library would stretch 30 miles
IGS geologists determined that a meteor struck northeast Iowa 470M years ago