Folded cherts, Port Macquarie3D Model
These folded ribbon cherts at Miners Beach, Port Macquarie display complex folding. The cherts themselves are interlayered jasper and green chert. These sediments are pelagic deposits that sit atop the seafloor metabasalts found elsewhere at Miners Beach.
At least two phases of folding are apparent in this block. Isoclinal F1 folds have a near vertical (but folded) axial plane. Superimposed in this are more open F2 folds with a near horizontal axial plane. Additionally, there are a series of extensional quartz veins at right angles to the F1 fold axis which may indicate the extension direction during the F1 folding event.
These rocks form part of the accretion-subduction complex of the Southern New England Orogen.
The lens hood is ~70 mm in diameter.
Comments