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From: lruss@mhuxi.UUCP (LAWRENCE RUSS)
Newsgroups: net.physics
Subject: Re: Caverns Under New York Metropolitan Area?
Message-ID: <243@mhuxi.UUCP>
Date: Tue, 4-Dec-84 18:39:58 EST
Article-I.D.: mhuxi.243
Posted: Tue Dec  4 18:39:58 1984
Date-Received: Wed, 5-Dec-84 01:28:41 EST
References: <660@clyde.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 27

> ???????????????????
> 
> 	I recently heard from a friend about an enormous system of natural
> caverns which were apparently just discovered (by someone at Columbia
> University?) in the region of New York City and northern New Jersey. I would
> like to know if anyone has any additional information about these caverns,
> especially their depth below ground level and a map of the areas to which they
> extend.
> 
> 					clyde!bonnie!jmm
> 					J. M. McGhee
> 					(201) 386-2333



   The existence of an enormous system of caverns under New York 
City is not a new discovery and, in fact, has been known for 
quite a long time, since about 1904.  The caverns have been well
studied by geologists and fall under three classifications
known as IRT, IND, and BMT.  (The meaning of these abbreviations
escapes at the moment.)  They are an enormously popular tourist
attraction, drawing over one million visitors per day, and the
City of New York regularly runs tour trains through the caverns
at a nominal charge of 90 cents.  

   There are some 400 entrances to these caverns, and maps are 
available at most of the entrances.  :-)