October 31, 2014
Columbia Geology Tour Part II


Earth and Environmental Sciences
Higgins Professor

In the shallow seas of the Mississippian some 340 million years ago, a death assemblage of sea life settled into layers of sediment in the area that would become Indiana. Now you can see evidence of that ancient life decorating the limestone columns of St. Paul's Chapel. Part 2 of the Columbia Geology Tour, following along with Professor David Walker as he talks about the stones that make up Columbia University buildings, and what they can tell us about Earth's past.