Thrombolites and stromatalites (microbialites) are

"organosedimentary structures that are formed by benthic microbial communities which trap and bind detrital sediment and/or precipitate calcium carbonate" (Burne & Moore, 1987).

These structures are some of the earliest known life on Earth. Fossils of stromatolites have been found in the Pilbara region of Western Australia dating back 3500 Ma years (Grey et al. 2012).

The living thrombolites of Lake Clifton are of immeasurable scientific value and are classified as
“HIGHLY ENDANGERED”

They will not survive changes to the groundwater level, increased nutrient levels,
physical damage such as trampling or other environmental disturbances

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