pubs.usgs.gov · 2011-09-08 · qub gravel sl ides af a/s quarry site spoil bank, quarry waste pits...

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Page 1: pubs.usgs.gov · 2011-09-08 · qub Gravel Sl ides af a/s quarry site spoil bank, quarry waste pits site of gravel pit in man-made features earth earth earth now f I ow flow 10 X