Banks Wall Sandstone

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.

Katoomba, Australia

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

References

1. "Banks Wall Sandstone". Geo Science Australia. Australian Government. Retrieved 7 May 2018.
2. "Walking Tracks". the Botanist's Way. Blue Mountains Botanic Garden, Mount Tomah. Archived from the original on 7 May 2018. Retrieved 6 May 2018.