stalagmitical

The sides of the cavern had a stalagmitical appearance but the recess was so dark that we could not ascertain either its formation or extent; it did not however appear to be more than twelve or fourteen yards deep.

Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 1

The sides of the cavern had a stalagmitical appearance, but the recess was so dark that we could not ascertain either its formation or extent ....

The History of Australian Exploration from 1788 to 1888