:::::Folded layers of rock, which cannot fold unless they are first wet layers of mud. There is an "S"-curve in the rock in this image[http://www.purchon.com/ecology/images/folds.jpg], which didn't get that way if it was ordinary dry rock. This is indicative of differing types of sediment depositing in layers, then something violent happening to cause these layers to bend before they harden. ''Experiment:'' try setting down several layers of flat slate or similar hard rock, ''then bend the whole without breaking it''. Then do the same with wet layers of clay. | :::::Folded layers of rock, which cannot fold unless they are first wet layers of mud. There is an "S"-curve in the rock in this image[http://www.purchon.com/ecology/images/folds.jpg], which didn't get that way if it was ordinary dry rock. This is indicative of differing types of sediment depositing in layers, then something violent happening to cause these layers to bend before they harden. ''Experiment:'' try setting down several layers of flat slate or similar hard rock, ''then bend the whole without breaking it''. Then do the same with wet layers of clay. |