White Cliffs being a working opal deposit, and the town existing there because of it, I can't imagine that the whole area wouldn't have been extensively surveyed before this to gauge its suitability for mining. Maybe it just wasn't thought to be important at all.... ?
Interesting crescent shape. Looks like heavy erosion to the SW, but is the ejector just more prevalent in the NW corner because, maybe, the impact was from the SW? Great find. Lots of meteor chunk hunters heading to White Cliffs I guess...
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