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#26
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On 2006-06-07, Ken Reed wrote:
If it's over 1,000 feet from the base to the top, it's a mountain. According to ? Poking around the Internet, there appears to be many definitions for a mountain - 1000 feet is what they told us at school (probably because we lived within sight of the Malvern Hills, which are a little over 1000 feet and defined locally as 'mountains'), and probably due to the old Ordnance Survey definition (more on that later). Wikipedia says that "In the United States, a mountain is 1,000 feet (304.4 metres) or more in height from bottom to summit. A hill is 500 (152.4 metres) to 999 (304 metres) feet. A discernible hill that is less than 500 feet high is a knoll" (with the caveat 'citation needed'). However, the USGS says there is no official definition as to what makes a mountain a mountain and not merely a hill - it seems to be locally defined. In the UK, Department for Environment, Food and Rural Affairs defines mountain as all land over 600 m. This is a close metric equivalent of 2,000 ft (which is 609.6 metres). The British Ordnance Survey (the people who do all the surveying and mapping in the UK) used to define a mountain as being 1000 feet or more, but no longer appear to have an official definition of what makes a mountain. So, in summary - if you're in the US, anything over 1000 feet bottom to top is a mountain, in the UK - if you're following the old OS definition, also 1000 feet. But you need 2000 feet if you're following DEFRA's definition. Online dictionaries are rather vague - "A natural elevation of the earth's surface having considerable mass, generally steep sides, and a height greater than that of a hill." In any case, if it's steep sided and you run a plane into the side of it, you're going to be just as dead whether the definition of mountain is 1000 feet or 2000 feet over the prevailing terrain, or not officially defined at all. Even small mountains, such as Snaefell in the Isle of Man (just over 2,000 feet) generate the usual mountain effects - downdrafts, rotor, mountain wave, local weather variations etc. so not respecting the smaller mountains is foolish. -- Yes, the Reply-To email address is valid. Oolite-Linux: an Elite tribute: http://oolite-linux.berlios.de |
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