(My first post, so please excuse anything that will be obviously obvious when I read/write more...

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Time, erosion, vegetation and human activity can mask possible e-scars.The Great Dividing Range is a long ,low (compared to other continental ranges), chain of hills and valleys running the length of eastern Australia. My home turf for many years, the Blue Mountains, west of Sydney, has some interesting features which fit the bill - maybe?
https://www.google.com.au/maps/@-33.606 ... !2e1?hl=enLocation centred on the Grose Valley, with its interesting tri-arm shape. To the north are the Wolgan and Capertee Valleys, with anomalous mesa formations, sheer cliffs and some flat floors.To the south, the Burragorang Valley, with mesas etc.
Matt Gray
Of course, I could be mistaken.