A closer look at the Little Salt Spring

Trained archaeologists were at Little Salt Spring Saturday to give area residents the lowdown on Little Salt Spring.

And in the case of North Port's most famous archaeological site, "lowdown" means just that: about 250 feet, the depth of the sinkhole.

The sinkhole is a classic "cenote," a sinkhole caused by the erosion of limestone by underground water. It is fed by underwater springs, and except for the water close to the surface, it is devoid of oxygen in much of its depth.