On June 7, 2015, from 10:00 a.m. to 12:30 p.m., NYC H20 is sponsoring a walking tour of the city’s geological materials.  New York has an abundance of building stones -in lobbies, on facades, sidewalks and curbstone. These materials used in its streets, building facades and lobbies show the richness and variety Earth history.  On our trip we will see many varieties of rock type from North America, Europe, Asia, South America and Africa ranging in age from 3 billion years to a mere 1 million years old. And we will decipher the history that each rock tells. Water plays an important role in the formation of many of them.

Sidney Horenstein, the tour guide, is a geologist and environmental educator emeritus at the American Museum of Natural History. He is co-author of recently published Concrete Jungle (University of California Press).  It’s about New York City and our last best hope for a sustainable future.

Rain date: June 14

Click here to sign up and to get more information.