Banks Wall Sandstone Explained

Banks Wall Sandstone is a type of sedimentary rock occurring in the Sydney Basin in eastern Australia. This stratum is up to 115 metres thick. Often seen in the Blue Mountains, such as at the Three Sisters at Katoomba.

The rock is mostly quartzose, but also contains many ironstone bands, with conglomerates and numerous claystone lenses several metres thick. It is situated above the Mount York Claystone. Formed in the early Triassic, it is part of the Narrabeen Group of sedimentary rocks^{[1] [2]}

See also

• Sydney Basin
• Mount York Claystone
• Narrabeen group

Notes and References

1. Web site: Banks Wall Sandstone. Geo Science Australia. Australian Government. May 7, 2018.
2. Web site: Walking Tracks. the Botanist's Way. 6 May 2018. Blue Mountains Botanic Garden, Mount Tomah.. https://web.archive.org/web/20180507221444/http://www.thebotanistsway.com.au/along-the-way/walking-tracks/. 7 May 2018. dead.