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Cottonjaw t1_j7h32y3 wrote

Reply to comment by THEpottedplant in Is there a term for lake bottoms that "hour glass" (temporarily becomes wider following a "shelf" as the depth increases ) , how do bathymetric maps depict this, and does this have a common affect on turbidity, thermoclines, or other characters? by Irisgrower2

The only thing I can imagine is karst terrain (limestone erosion) causing a sinkhole to form. Typical lake forming processes shouldn't result in this.

Grain of salt; I only have an undergrad in geology, and hydro was not my jam.

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