Nickel-Iron Spherules from Aouelioul Glass

+ See all authors and affiliations

Science  11 Nov 1966:
Vol. 154, Issue 3750, pp. 759-765
DOI: 10.1126/science.154.3750.759


Nickel-iron spherules, ranging from less than 0.2 to 50 microns in diameter and containing 1.7 to 9.0 percent Ni by weight, occur in glass associated with the Aouelloul crater. They occur in discrete bands of siliceous glass enriched in dissolved iron. Their discovery is significant tangible evidence that both crater and glass originated from terrestrial impact.