Here's a gour pool in Ingleborough Cave which we've watched for some time. Soon after its inlet flowstone stops flowing in dry weather the water level in the pool slowly starts to fall. (There is evidently slow leakage between the crystals from which the calcite is composed.) After about 2 weeks of dry weather it sometimes dries up completely. This picture shows it after 5 dry days.
If a stalactite grows down into such a pool which has dried up, then conditions change and it refills with water with a lot of dissolved limestone in it, a flange can grow out from the stalactite at water level. Later, if the water disappears again, the result may look like Badlad's recently discovered formations. Those in his photo are a particularly fine example! Maybe evidence of climate change?