21. The areas around the Mississippi are composed of thick regolith that is around thick. 22. Micrometeorites in particular produce a glassy melt in the regolith that lowers the albedo. 23. Similar research is still ongoing : Measurements of Electrical Discharges in Martian Regolith Simulant. 24. It is, however, difficult to explain the origin of a putative regolith . 25. Hawaiian volcanic ash has been used as Martian regolith simulant by researchers since 1998. 26. Chlorine is very rare in lunar regolith . 27. Alternatively, oxygen can be liberated from the lunar regolith without reusing any imported materials. 28. The composition of the lunar regolith can also be used to infer its source origin. 29. Lunar regolith has a number of uses. 30. The effect is particularly pronounced on regolith surfaces of airless bodies in the solar system.
