Caves are a common feature of karst landscapes—the rugged sort formed in rocks that dissolve easily such as limestone (mainly calcium carbonate), forming underground passages and drainages.
These formed when water enriched by dissolved carbon dioxide (CO age: the tiny water droplet, which built that stalagmite, had to keep arriving at precisely the same spot on the floor of the cave for 100,000 years!
Well, I knew—and all karstologists know—that the surface of limestone terrains above caves changes dramatically in short periods of time.
And any change at the surface also changes the location of the water droplets inside the cave.
However, the stalagmites do not indicate any changes.
So the conclusion is simple: they cannot be that old.
And that fact indicates the old-age belief is fallacious.Speleothems are amenable to the uranium-thorium (Th) method of dating, and caves are assumed to be much less prone to variations of all sorts.Sometimes the ‘measured’ ages of speleothems can be tested by radiocarbon ages of artefacts and fossils found in caves.Speleothems are believed to preserve accurate records of ancient climates—or paleoclimates.This is because they preserve oxygen and carbon isotope ratios from the past, and that allows scientists to make paleoclimate reconstructions.Radiometric dating however often disagrees with the observed growth rates of speleothems and their complex formation processes, and this confuses attempts to make sense of speleothem interpretations.