Story by Kim Martineau, Lamont-Doherty Earth Observatory; video series by David Funkhouser & Kim Martineau
The hunt for interesting rocks can lead up rugged mountains and through twisting streams. Sometimes it can also lead to urban college campuses.
For the last decade or so, Columbia University geologist David Walker has led students and colleagues on a tour of the geologic gems hiding within Columbia’s McKim, Mead and White campus in Morningside Heights. The tour starts at Schermerhorn Hall, home of Columbia’s Department of Earth & Environmental Sciences. “Speak to the Earth and it shall teach thee,” Walker intones, reading the Biblical words inscribed over Schermerhorn’s door. From there, the tour winds past Alma Mater, up the steps of St. Paul’s Chapel, into the Burden room of Low Library and over to the stairwell in Lewisohn Hall for a glimpse of an extinct alpha predator. Along the way, Walker points to evidence of how life on earth and the planet itself has physically evolved over its 4.5 billion year history.
Walker has focused his own career on more distant sites. Early on, he studied rocks brought back from NASA’s Apollo mission to the moon for clues about its origins. Later, he trained his sights on work in the lab to understand how earth’s core, 1,800 miles beneath our feet, evolved. A professor and research scientist at Lamont-Doherty Earth Observatory since 1982, he is a member of the National Academy of Sciences and recipient of numerous awards, including the 2010 American Geophysical Union’s Harry Hess Medal for outstanding research on the makeup and evolution of Earth and other planets.
This series of videos begins today with a look into the Burden Room, a Victorian inner sanctum deep inside Low Library. There we learn about fossil corals from the Devonian period, 400 million years ago, when the moon orbited a bit closer, and a day on Earth lasted just 21 hours.
Stay tuned next Monday for Part 2: How life etched its patterns into the stones of St. Paul’s Chapel. (You can watch all of the videos on YouTube here.)
(Story first posted on State of the Planet Sept. 15, 2014.)