Other
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1541w&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 541.
Other
1
Lunar Rocks, Anorthosite, Weathering, Apollo 16 Flight, Scanning Electron Microscopy, Lunar Surface, Spectrophotometry, Breccia, Lunar Soil
Scientific paper
We recently defined three basic types of patina for Apollo 17 crystalline matrix breccia 76015 and high-Ti mare basalt 75075. Accretionary microcratered pancake-bearing (AMP) patina, found on 76015 is characterized by the presence of microcraters and glass pancakes (small circular glass splashes) in all size ranges. These microcraters and pancakes are evidence of direct exposure to space, as are solar flare tracks and possible solar wind sputtering erosion. The other two types of patina we recently defined, which were found on mare basalt 75075, include accretionary coalesced (AC) patina, consisting of thin discontinuous layers of glass, and accretionary welded fragmental (AWF) patina, made up of accreted layers of rounded, well-sorted mineral and glass grains. The AC and AWF patinas on 75075 showed no evidence of microcraters, pancakes, or any direct interaction with the solar wind.
Keller Lindsay P.
McKay David S.
Wentworth Susan J.
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