Harriet Crawford finds this "mixing of the waters" to be a natural feature of the middle Persian Gulf, where fresh waters from the Arabian aquifer mix and mingle with the salt waters of the sea.[8] This characteristic is especially true of the region of Bahrain, whose name in Arabic means "two seas", and which is thought to be the site of Dilmun, the original site of the Sumerian creation beliefs.[9] The difference in density of salt and fresh water drives a perceptible separation.