A glacial pothole in the bedrock has been revealed 110 feet below the streets of New York City by structural engineers planning the foundation of Tower 4 for the new World Trade Center. The hole, a 40 foot deep ding in the bedrock, was created by the movement of glacial ice some 500 million years ago.
Quotes
"It's nice to look at, but it's all got to go." Robert B. Reina, structural engineer at Mueser Rutledge Consulting EngineersNewsday: Trade center dig exposes glacial landscape (September 22, 2008)
References
Fast Facts
-
Fact:
Part of the pothole was seen during construction of the WTC in the 1960s, and noted again when the slurry wall was rebuilt after 9/11The New York Times: At Ground Zero ...the Ice Age (September 21, 2008)
-
A lecture on the pothole will be given at the WTC site by geologists Cheryl J. Moss and Andrew Pontecorvo at 7
-
Fact:
Called the "Grand Canyon of Lower Manhattan" the hole will be covered or blasted awayThe New York Times: At Ground Zero, Scenes From the Ice Age (September 21, 2008)
