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A detailed petrological and mineralogical study of lunar meteorite NWA 11801 has found 24 glasses, nine of which have similar compositions. The chemical composition of nine glasses are similar, and their elements (for example major elements of Mg, Al, Ca, Fe and trace elements of Mn, Cr, etc) are distributed in a small area. They have MgO/ Al2O3 = 1. 31-1. 54, which falls in a range of lunar volcanic glasses (MgO/ Al2O3 >1. 25), so nine glasses are volcanic glasses. However, they have certainly discrepancy in the structure, the number and morphology of the internal microcrystals of volcanic glasses, these differences are caused by different cooling environment. Therefore, the features of structure and composition of nine volcanic glasses indicate that they may be from the same source of magma eruption and form in the different cooling environment. In addition, olivine phenocrysts are found in a volcanic glass. The olivines are euhedral with a high Fo value (76. 4 mol%-78. 2 mol%), indicating that olivines come from the interior of the moon and record the crystallization and evolution of lunar magma. [ABSTRACT FROM AUTHOR]