In Posts 433 and 434 there is talk of pottery and bones found in the area.
I worked out in Abu Dhabi where I came across the same. At the time we had a helicopter in Oman doing a servey for a Canadian Mining company. I used to go over there to service it from time to time and got talking to some of the Canadian. It turned out that they were looking for the place that the people, that lived there in Umpty BC, getting old and can't remember exactly, mined copper. They were called Dilmun and tablets translated from Ur told of a trade in copper. Anyway they found the old mine and now it a new mine doing very well in Oman. If you want to read more the book is called 'Looking for Dilmun' Very interesting for the history of the area.
Not 100% sure on the spelling of Dilmun it was all a long time ago.