Terrigal Formation
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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 amphibian Arenaerpeton supinatus.[3]
Quick Facts Type, Unit of ...
Terrigal Formation | |
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Stratigraphic range: Early-Mid Triassic ~252–237 Ma | |
Type | Geological formation |
Unit of | Narrabeen Group |
Underlies | Hawkesbury Sandstone |
Thickness | up to 330 metres (1,080 ft) |
Lithology | |
Primary | Sandstone and siltstone |
Other | Claystone |
Location | |
Region | New South Wales |
Country | Australia |
Extent | Sydney Basin |
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