ERTH3104 Virtual Field Trip to New England Orogen
Stop name: Barry Road outcrop of the Gamilaroi Terrane
Location: ~6 km SE from Nundle towards the Hanging Rock, along the Barry Road
Coordinates: 31°28'32.31"S, 151°10'16.09"E to 31°28'27.15"S, 151° 9'55.33"E
What to see: There is a road cut of ~700 m between these two locations. This is a section from limestone to pillow basalt, representing parts of the Gamilaroi terrane intra oceanic island arc. The northern side of this outcrop has light grey-coloured fossiliferous limestone, which then transits into massive to pillow basalt. Pillow structures are most visible towards the southern end of this outcrop.
Additional data: A petrographic thin section of an altered ocean floor basalt (19BA01 from Thin section collection)
(Above) Fossiliferous limestone within this section. Visible fossils in this photo are corals. (Photo by R. Zhou)
(Above) Pillow basalt within this section. Note the pillow structure close to the hammer. (Photo by R. Zhou)
Contact between the limestone (left) and basalt (right)
Thin section 19BA01 was taken from this basalt. (Photo by D. Janz)
Devonian radiolarians (Scale bar is 100 micrometres) from the
Gamilario Terrane.
(Plate by J. Aitchison)