All articles tagged with #strewn field
An international team reports a 900-kilometer tektite strewn field in Minas Gerais, Brazil, dating to as much as 6.3 million years ago, evidence of a large meteorite impact, but the crater has not yet been found; researchers hope magnetic and gravimetric studies will reveal its ring-shaped footprint near the field.
Scientists have identified hundreds of tektites—glass droplets formed when a meteorite melted surface rock—over a 900-km region in Brazil, named geraisites. Dating places the material up to about 6.3 million years old and reveals an ancient crustal source from the São Francisco Craton. No nearby crater has been found, but the discovery expands Brazil's impact history and suggests tektites may be more common than previously thought.