Earth:Terrigal Formation

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Terrigal Formation
Stratigraphic range: Early-Mid Triassic
~252–237 Ma
Terrigal NSW 2260, Australia - panoramio (29).jpg
Terrigal, Central Coast, Australia
TypeGeological formation
Unit ofNarrabeen Group
UnderliesHawkesbury Sandstone
Thicknessup to 330 metres (1,080 ft)
Lithology
PrimarySandstone and siltstone
OtherClaystone
Location
RegionNew South Wales
Country Australia
ExtentSydney 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 amphibian Arenaerpeton supinatus. [3]

See also

References