Are you telling me that if you were in either of the bunkers in the first picture, you would ground your club?
Because, the USGA has said that a bunker must be "man made"??
I don't understand.
I didn't intend to start a firestorm--
But I do need to respond one more time--
The definition of a "bunker", which is type of hazard along with a water hazard, is not the creation of the USGA(So why even mention the USAG)-- Its those darn Scots associated with the Royal and Ancient who came up with that definition over 150 years ago--
And they used that definition to define an area which "from which the soil or turf had been removed"--whether by Tom Morris or a sheep-- And the first of those areas were where sheep had dug away the turf on the side of turf covered mounds to create shelter from the winds(if you drive though Scotland today will see what appears to be beautiful bunkering in grass covered fields, until you look closer and see that those are "shelters" built by sheep--they still do it today--)
And why was this important to the Scots? Because there was different relief granted from a hazard than through the green, and you had to play your way out of a hazard, but could take unplayable from the natural dunes--
And despite what you call them, those areas in every desert course I have set up for competition plays those sand areas as through the green, and not bunkers, and Cypress and Maidstone play those sand dunes as through the green and not bunkers, and St Andrews play the sandy areas adjoining the fairways as through the Green, and the sandy areas in the coastal Carolinia courses and at Pinehurst are played as through the green and not bunkers--
And all those pictures that Tommy posted, if you look at the historical notes and the old cards of the courses, do not play those areas as bunkers--the bunkers on those courses were the areas surrounded by sod and were designated as hazards--the natural sandy areas were not--
And its not only that you can't ground your club in a bunker, nor remove sticks coving your ball, you can not take unplayable out of a bunker(except S&D) and must play your way out--