Munmorah Conglomerate

TypeGeological formation

Unit ofNarrabeen Group

OverliesNewcastle Coal Measures

Thicknessup to 140 metres (460 ft)

Munmorah Conglomerate
Stratigraphic range: Early-Triassic PreꞒ Ꞓ O S D C P T J K Pg N ↓
Bird Island, Central Coast, Australia
Type	Geological formation
Unit of	Narrabeen Group
Overlies	Newcastle Coal Measures
Thickness	up to 140 metres (460 ft)
Lithology
Primary	Medium to coarse-grained sandstone and conglomerate
Other	Minor amounts of siltstone and claystone
Location
Region	Sydney Basin
Country	Australia

Munmorah Conglomerate is a geologic formation in the Sydney Basin in eastern Australia. This stratum is up to 140 metres thick. Formed in the early-Triassic, it is part of the Narrabeen Group of sedimentary rocks. This formation includes medium to coarse-grained sandstone and conglomerate. With minor amounts of siltstone and claystone. Below the Munmorah Conglomerates are Newcastle Coal Measures, originating from the Permian.^[1][2]