Varved shaleYour model is disabled. For more details go to Edit properties3D Model
This varved shale specimen is from the Carboniferous forearc basin of the Southern New England Orogen of eastern Australia. Varved shales form in a glacial environment and each ‘varve’ represents a sequence of annual deopisits. Spring meltwaters flood glacial lakes and shallow marine areas bringing a mixture of fine and some coarser sediments. The coarser components deposit first, followed by finer silt and clay layers that take longer to deposit. Varved shales are quite common in the late Palaeozoic of Australia. Some sites are heritage listed such as Seaham Quarry north of Newcastle.
This specimen also contains a small fault structure. The forearc basin sequences in the region were deformed during the Hunter-Bowen Orogeny in the mid Permian. Reprocessed model uploaded 14th Feb 2021.