CompuServe Messages

Hi, Kamron– >> I can see this explanation as working but the towers should be at the sides of the canyon instead of the middle. From the river's viewpoint the towers-to-be are at the side of the canyon. But if you draw lines parallel to the _general_ trend of the river tangent to the meanders, you see a future canyon in which the towers are on the opposite side of the centerline from their "side" as now seen by the river. If a boat in the river sees a tower pass on starboard, a crow flying downstream along the centerline of the whole shebang will see it on the port side. >> I beleive there are only tributaries in one side of the canyon as I remember .. is that the case? I do not swear, but that is how I recall it. >> why, if the river started in a low spot area would there not be traces of ancient tributaries comming into the canyon from the other side also. Low spots can be quite asymmetric. Let a general downtrend meet an anticline, fault, or whatever… From your message to Jon: >> The carving of a canyon would maintain a V shape. How would you account for vertical walls in a canyons? That depends on the rock involved. The more cohesive the rock, the steeper its angle of repose, which I think is the main determinant of the classical V-shape of a river-cut valley. But where other tricks come into play like undercutting, less stable configurations steeper than the angle of repose may be found. –Doug