Australasian strewnfield

Additional finds in northern Tibet, Guangxi and Antarctica increased the strewnfield to about 30% of the Earth's surface, or almost 150,000,000 km2 (58,000,000 sq mi), or about the size of the entire world's landmass.

[12] In 1991, Wasson et al. studied layered tektites in central Thailand[13][14] and explained the lack of a large recognizable source crater by occurrence of small, diffuse, multiple impact event spread out over the region.

[10] Lee and Wei (2000) concluded that the source of the Australasian strewnfield is a large impact crater in Indochina and estimated it to be 90–116 km (56–72 mi) in diameter.

[17] More recently in 2020 and again in 2023 Sieh et al. proposed on the basis of various lines of evidence that the crater lies buried beneath the Bolaven volcanic field in southern Laos, and was around 15 kilometres (9.3 mi) in diameter.

[25] In 1985, Muller and others[26] proposed a geophysical model that explained the magnetic reversals as the result of a decrease in geomagnetic field intensity associated with a minor glaciation that was caused by and followed the impact event.

[27] A similar study of the association between Ivory Coast strewn field and the onset of the Jaramillo normal polarity subchron found them also not to be contempraneous as previously inferred.

[28] Archeological artifacts found with these tektites in Baise, Guangxi in southern China indicate that a Homo erectus population was living in the area during and after the impact.