Trendall locality

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Trendall locality


This is a transcript of a QuickTime movie (5.5 MB) recorded in the Pilbara in 2005. Abby Allwood, from the Australian Centre for Astrobiology, talks about the context of the Trendall locality.

Transcript:

This is the Trendall locality, the Trendall outcrop right behind me here. It’s basically the end of a ridge. The Strelley Pool Chert stands high as ridges in the area because it is more resistant to weathering than the rest of the rocks around it. So usually it sticks up like that, but here where it has been bisected by the Shaw River it has been brought down to ground level. It’s a nice flat outcrop, nice and accessible for geologists to get to easily and perhaps that why it was discovered. But it has become famous because it contains, or it has beautiful outcrops of conical stromatolites and they would be the most convincing evidence of life in the early Archaean, so three and a half billion years ago, that we have to date. People have talked a lot about the morphology of the stromatolites here and debated whether or not they think they are really biological in origin and that’s what I’m looking at is the evidence for and against and I started my PhD on this outcrop and have worked along strike or laterally along the ridges from here, about 20 km or 10 km in that direction and about 20 km in that direction.

Contents


Introduction

Context

Early Life

Evidence

Acknowledgements

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