At the old Delafield Estate, in the Riverdale section of the Bronx, the rock outcroppings that dot the surface of the land are made of nearly fissureless quartz called Manhattan gneiss. It is very difficult to build around, or blast through.....
http://www.nytimes.com/1984/09/21/business/about-real-estate-riverdale-estate-project-obstacles-are-overcome.html
http://www.nytimes.com/1984/09/21/business/about-real-estate-riverdale-estate-project-obstacles-are-overcome.html
| nyt_-_9.21.84.pdf |
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