213 



toon Creek has cut a ravine in the MansHeld sandstone bluff and originally 

 fell over a ledge aliout six feet high. A Jnint plain 20 feet baciv from the 

 brink of the fall iierniitted the stream t<> descend and work its way luider 

 the stratum. The i-esult is a iiatuial ))i'idge (iO feet long, 20 feet wide. 2 

 feet thick in the middle with a span of t\U feet and a clear heiglit of (i 

 feet inidcrni-at-h. ( I'ig. I.";.) 



Figure 15. Natural Bridge, Mansfield, Ind. 



