[meteorite-list] Tunguska Questions

[Meteorites USA]

Hi,

Here's an excerpt from Wikipedia, however accurate this is I'm not sure 
but it give and example of the firepower of a "small" projectile. The 
charge used to fire such a distance is a few pounds of gun powder. Maybe 
I was wrong about the hundred mile range of the Naval artillery.

"...On 20 January 1989, during an improperly authorized gunnery 
experiment off Vieques Island, the USS Iowa fired a 16-inch (406 mm) 
shell 23.4 nautical miles (27 mi; 43 km), setting a record for the 
longest-ranged 16-inch (406 mm) shell ever fired..." SOURCE: 
http://en.wikipedia.org/wiki/USS_Iowa_(BB-61)

A nautical mile is equal to 1.15077945 statute miles. 27 nautical miles 
is equal to 31.07 miles range.

Compare this Navy gun to the power of the blast at Tunguska and you have 
a real good way to not only vaporize a large portion of the meteoroid, 
but maybe to launch large pieces tens of miles away from the epicenter.

Do you really believe absolutely EVERYTHING was destroyed from the 
blast? I know a nuclear explosion is powerful but come on. Don't you 
think it's possible something larger than the grain of sand, macroscopic 
particles, and isotopic evidence survived?

Regards,
Eric




GeoZay at aol.com wrote:
>>> If a Navy destroyer can launch a huge  shell a hundred miles 
>>>       
> using a few pounds of gunpowder, <<
>
> I  think the largest gun on a U.S. Navy destroyer is around a 5 inch? I 
> think their  range is about 8 to 10 miles? Just guessing here. A battleship  
> equipped with a 16 inch gun, I think it's range is in the neighborhood of 
> about  26 miles? Outside of missiles, I don't know of anything bigger on a ship. 
>  
>
>
>   
>>> , how far can a meteoroid blast such as 
>>>       
> this launch  stone fragments?<<
>
> the further a stone fragment gets launched, also  means the more energy 
> available to pulverize it when it smacked the  atmosphere I would think.
> geozay  
>
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-- 
Regards,
Eric Wichman
Meteorites USA
http://www.meteoritesusa.com
904-236-5394