Greencastle Township, Marshall County, Iowa

Greencastle Township is a township in Marshall County, Iowa, USA.[1]

History

Greencastle Township was organized in 1856.[2]

gollark: What do you mean "infinite overtones"? I don't think that's how sine waves work.
gollark: In older swarms their internal networks would mess it up, but any remotely modern one uses EM.
gollark: If they're that small.
gollark: As such, you are not hearing individual ones; probably, your head disrupts any nearby antinodality™ lots anyway.
gollark: So 160 times more antinodes would make them VERY close together.

References
  1. U.S. Geological Survey Geographic Names Information System: Greencastle Township, Marshall County, Iowa
  2. The History of Marshall County, Iowa: Containing a History of the County, Its Cities, Towns, &c. Western Historical Co. 1878. pp. 341.



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