three forms of tektite found recently in Việt Nam
Anh Tuấn, La Thế Phúc,
Đỗ Chí Kiên, Trương Quang Quý
Tektites have been found in many places on the territory of Việt
with different sizes and shapes. Their main colour is black; their surface is usually
hollow and has many grooves. This article
introduces three forms of tektite having some unusual features, found recently in
Người biên tập: Lê Đức An.