21. It is speculated that the hypothesized Pantasma Impact Crater in northern Nicaragua might be the source of these tektites . 22. These are possibly tektite deposits, formed as molten material ejected by a meteorite impact fell back to Earth. 23. Molten terrestrial material ejected from a meteorite impact crater can cool and solidify into an object known as a tektite . 24. From the 1950s through the 1990s, NASA aerodynamicist Dean Chapman and others advanced the lunar origin theory of tektites . 25. Third, tektites contain virtually no water ( < 0.02 wt % ), unlike terrestrial volcanic glasses. 26. Recognized types of tektites , grouped according to their known strewn fields, their associated craters, and ages are: 27. He suggested that explosive, hydrogen-driven lunar volcanoes may be the mechanism that launched the tektites to Earth. 28. Then on Feb . 14, lunchtime, the Universe Cybercafe at Tektite Building will be the venue for the Eyeball. 29. Evidence for the impact origin of the crater includes shocked quartz, a gravity anomaly, and tektites in surrounding areas. 30. The impact has been identified as the source of the North American tektite field, namely the Georgiaite and Bediasite fields.
