ROCK FOLDS DUE TO WEATHERING 



719 



photograph pass below the fold, but the overlying bed, having 

 a thickness of about 4 inches, appears to be undisturbed also. Above 

 this the strata, for a depth of from 3 to 4 feet, have been thrown 

 into a distinct antichne with a height on its axis of at least 2 feet. 



Fig. I. — Surface fold in thin-bedded sandstone near Spielersville, Ark. 



The hnear extent of this small fold is unknown, as the country imme- 

 diately adjacent is covered by a heavy mantle of turf which makes 

 it difficult to trace such features. 



It is evident that glacial action has had no part in the formation 



