Welts

welt formation
Welts, as seen near the bottom of ths column, are thought to compare to cave shields

NPS PHOTO

Welts are thought to be similar to cave shields. They are like scars of calcite. They grow along a fracture in the bedrock or in a speleothem that is opening very slowly. A sudden break will not for a welt. A column may pull apart because of settling, or washing away, of underlying sediment. As the crack grows, water seeps out and deposits calcite in the form of a welt.

Last updated: February 28, 2015

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