Michael Dugger;
At a number of locations at Bandon, there ARE places where there is REDSHOT, which is simply compacted sand with a proponderance of the element iron. It IS exposed by wind blowing the sand away.
However, that does NOT occur in areas where turf is established, only in areas void of turf.................such as in front of #7 tee at Bandon Dunes, and along the cliffs on #5 and #16. So, nearly universally at all the courses, the turf is supported by deep, permeable sand.
Hope this helps.
And, FWIW, there is virtually NO redshot (to my knowledge) at Old Mac.
Tom