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When discharge exceeds the capacity of the fractures to divert the water, the flow over the waterfall is directed into the overflow channel 3 at the north end of the gulf where it is then diverted underground through a series of swallow holes (Fig.
2) in the far southwest side of the gulf until the swallow holes can no longer divert the volume of water discharging into the channel.
As water levels fall, the overflow channels drain water on the floor back into swallow holes that line the overflow channels (Malott 1952).
1952, The Swallow Holes of the Lost River, Orange County, Indiana.