Freshwater Stromatolites Discovered in Mulu’s Deer Cave
During a recent talk entitled “Freshwater Stromatolites in Deer Cave, Sarawak – A Unique Geobiological Cave Formation”, Professor Joyce Lundberg of Carleton University in Ottawa, Canada revealed the presence of stromatolites in Gunung Mulu National Park‘s Deer Cave.
These unique freshwater stromatolites were discovered in a low light zone close to the northeastern entrance to the cave, which is already well known for it’s vast passages and it’s three to four million strong bat population.
Stromatolites are layered sedimentary fossilised structures formed from layers of blue-green algae, calcium carbonate and other trapped sediments.
“These stromatolites grow in a series of horizontal narrow shelves up a part of the cave wall that is exposed to low light, vertically underneath the guano-laden shelf washed by fresh water from a shower head above,” – Professor Joyce Lundberg
The talk, part of a regular series organised by the Sarawak Museum, was attended by approximately 40 people.