2002年,瑞士伯尔尼大学的埃德温·诺思(Edwin Gnos)在阿曼沙漠发现了一块被命名为赛赫·乌海米尔169(英语:Sayh al Uhaymir 169)(Sayh al Uhaymir 169)的陨石,据信该陨石源自34万年前月表上的一次撞击喷出物。科学家们现在已认定它就来自环拉朗德陨石坑的喷出物覆盖层区[4]
,对陨石化学成分的分析表明,该地区是月球上钍含量最丰富的地点之一。
^Gnos, Edwin, et al., 2004, Pinpointing the Source of a Lunar Meteorite: Implications for the Evolution of the Moon, Science 30 July 2004: Vol. 305 no. 5684 pp. 657-659 DOI: 10.1126/science.1099397 abstract (页面存档备份,存于互联网档案馆)
McDowell, Jonathan. Lunar Nomenclature. Jonathan's Space Report. 2007-07-15 [2007-10-24]. (原始内容存档于2019-06-21).
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU. Space Science Reviews. 1971, 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763.