Terrigal Formation Explained

Terrigal Formation
Period:Triassic
Age:Early-Mid Triassic
~
Type:Geological formation
Prilithology:Sandstone and siltstone
Otherlithology:Claystone
Unitof:Narrabeen Group
Underlies:Hawkesbury Sandstone
Thickness:up to 330m (1,080feet)
Region:New South Wales
Extent:Sydney Basin

The Terrigal Formation is a geologic formation in the Sydney Basin in eastern Australia. Commonly seen in the Central Coast region, this stratum is up to 330 metres thick. Formed in the early to mid Triassic, it is part of the Narrabeen Group of sedimentary rocks. This formation includes interbedded fine to medium-grained sandstone and siltstone, with minor deposits of claystone. Hawkesbury Sandstone occasionally overlies the Terrigal Formation.[1] [2] Numerous fossils are known from this area, including the temnospondyl amphibians Arenaerpeton supinatus[3] and Platycepsion wilksoni.

See also

Notes and References

  1. Web site: Terrigal Formation. Geo Science Australia. Australian Government. January 19, 2020.
  2. Web site: Terrigal Formation. Down to Earth - Geology Exhibition. Adderley. January 20, 2020.
  3. Hart . Lachlan J. . Gee . Bryan M. . Smith . Patrick M. . McCurry . Matthew R. . 2023-08-03 . A new chigutisaurid (Brachyopoidea, Temnospondyli) with soft tissue preservation from the Triassic Sydney Basin, New South Wales, Australia . Journal of Vertebrate Paleontology . en . 10.1080/02724634.2023.2232829 . 0272-4634. free .