1. The paradox of age: Tectites and tectite showers - Izokh, E. P.
When discussing the problem of tectite origin, the age of the tectites themselves (actual glasses) must be distinguished from the date of their fall on the earth's surface, i.e., the geological age of tectite fields. The considerable difference between their two ages is the essence of the paradox which will be discussed here.
- 07-may-2009

2. Tectites of Vietnam. Tectites delivered by a comet: A hypothesis - Izokh, E. P.; An, Le Dyk
Tectites (tektites) are mysterious natural acid glasses that differ dramatically from terrestrial volcanic or impact glasses. There are many arguments that speak in favor of their non-terrestrial origin, and that is why the problem of their origin has an important scientific and historical significance. It is no accident that hundreds of publications written by specialists of various fields from all over the world are devoted to this issue. It is discussed at length in a collection of articles entitled 'Tectites' (1963,1973), as well as in the excellent monograph by O'Keefe (1976).
- 07-may-2009

3. Lunar and Planetary Science Conference, 15th, Houston, TX, March 12-16, 1984, Proceedings. Part 1
Various papers on lunar and planetary science are presented. The general topics addressed include: lunar highlands and early evolution; lunar regoliths, exposure, and impact processes; lunar volcanic gases; lunar luminescence; meteorite studies; Mars, tectites, and comets.
- 28-abr-2009

4. Neodymium and strontium isotopic study of Australasian tektites - New constraints on the provenance and age of target materials - Blum, Joel D.; Papanastassiou, D. A.; Wasserburg, G. J.; Koeberl, C.
The Nd and Sr isotopic compositions of Australasian tectites (including two flanged Australian tectites, two low-SiO2 Muong Nong-type tectites, and three high-SiO2 Muong Nong-type tectites) and the Nd, Sm, Sr, and Rb concentrations were investigated by isotope-dilution thermal ionization mass spectrometry, and the Sm-Nd and Rb-Sr isotope systematics were used to study the characteristics of the parental material. It is shown that the Nd and Sr isotopic data provide evidence that all Australasian tektites were derived from a single sedimentary formation with a narrow range of stratigraphic ages close to 170 Ma. It is suggested that all of the Australasian...
- 04-may-2009