Henbury Craters

 The Henbury Craters, 145 km south of Alice Springs, were formed by a meteorite impact about 4-5 thousand years ago. Several tonnes of iron-nickel fragments have been fossicked from the site. The largest of the dozen or so craters is 180 m across. The first person to study them was Arthur Alderman, a geology lecturer at Adelaide University. You can read his 1931 report here.