PARK RAPIDS — A tiny lake in Itasca State Park is revealing secrets about oceanic conditions in earth’s distant past. Deming Lake, a meromictic marvel“The lakes in Itasca are unique,” she said. It's called Deming Lake. Itasca Biological Station and Laboratories students Michelle Chamberlain and Daniel Musel take greenhouse gas measurements at Deming Lake. Meanwhile, NASA rovers on Mars have been exploring former lake beds such as Gale Crater, which Swanner said bears similarities to a meromictic lake.