| Marble (23) |  |
| Quartzite (3) | |
| Slate (6) | |
The researchers looked at marine sediment rocks from the Farrel Quartzite in Western australia. Isotopic analysis using secondary ion mass spectrometry was carried out at UCLA. To determine
if these inclusions were actually biological in origin the researchers looked at 15 different samples of Farrel Quartzite
When considered along with published morphological and chemical studies these results indicate that the Farrel Quartzite microstructures are bona fide microfossils
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