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Boardtree Falls

This fall shows a somewhat more rare waterfall occurrence for this region. Generally a waterfall will flow over a hard stone "cap rock"  (this is usually real hard sandstone in this region {whice is much harder than a sandstone you may find in the desert, which you can rub apart with your hands}) and it will erode a softer rock (limestone for example) until the water erodes enough rock to create a "free fall" waterfall and usually even an undercut or a "rock shelter" behind the falls. In the waterfall pictured, the upper rock is eroding at a faster rate than the middle and lower portions of the fall. This creates a "cascade" effect and such falls are referred to as cascades. These type of falls will keep cutting further and further into the top "cap rock" until there is nothing left but a series of rapids and cascades. This represents the death of a waterfall and the beginning of a "rapids" system. Don't make kayaking plans here though because it will take several thousand years before this fall is totally gone.