About 15 years ago in the gulf of carpentaria a fair way south of Normanton but north of Cloncurry I found an area that was uncovered by a grader whilst doing roads. The country was all sandy with no stone but this particular spot of about 4 meters x 4 meters had thin plates of hard very heavy stone as well as almost perfect spheres and bone like cylinders with ends that looked like joints. The material was very hard and heavy and really strange to be in country that had no other stone for miles. I always meant to tell some one who knew more than I do about fossils or at least had an interest in it but never got around to it. Sorry I dont have photos but assume its all still there and can point some one too it. Maybe a museum or some thing ?