Should I pile leaves for "filling" a sunken-ground area in my yard?
For years now, I have a large area in my yard where the ground is very "Sunken down" for lack of better wording. It is not really a giant hole but is a huge "hollow" that is about 9" deep. With all my current leaf-raking from our many front-yard trees (our county picks them up if we simply put piles by the roadside), I was wondering if I should consider hauling them to the back yard and using them for "fill" in that 'sunken' area. Or will they just "settle and deteriorate" as in a loose-mulch and not really make much difference? Then maybe is it best to just get a load of real-dirt delivered to 'fill in the large hollow-dipped-down-area? Thank you for your help, experience, thoughts!
P.S. I have already 'held out' and 'set aside' lots and lots of leaves for my composting and for my flower beds, etc. to cover over during the winter - yet still have so very much more!