Bitter Springs Group

The Bitter Springs Group, also known as the Bitter Springs Formation is a Precambrian fossil locality in Australia, which preserves stromatolites and microorganisms in silica.^[3] Its preservational mode ceased in the late Neoproterozoic with the advent of silicifying organisms.^[4]

Bitter Springs Group
Stratigraphic range: Tonian ~896–767 Ma Pha. Proterozoic Archean Had.
Type	Geological group
Sub-units	Gillen, Loves Creek & Johnnys Creek Formations[1]
Lithology
Primary	Chert
Location
Coordinates	23°32′34″S 134°27′26″E
Region	Northern Territory, Western Australia[2]
Country	Australia
Extent	Amadeus Basin
Bitter Springs Group (Australia)

Fossil Inzeria intia stromatolites from the Bitter Springs Group

Fossils include exceptionally well-preserved cyanobacteria microfossils, as well as multiple stromatolite species, including Linella avis and Inzeria intia.^[5][6] This locality also has been claimed to contain eukaryotic green algae preservation, though this interpretation is debated.^[7]