求翻译：该火山锥由玄武质熔岩、火山渣、火山角砾、火山弹和超镁铁质岩包体组成。其形成时代有U-Th年龄71±9 ka（Yu et al. 2003），和K-Ar年龄0.23±0.02 Ma (Fan et al. 2002)。是什么意思？

The volcanic cone of basaltic lava, scoria, volcanic breccia, volcanic bombs, and in ultramafic xenoliths. Its formation age of the u-th age of 71 ± 9 ka (yu et al 2003), and k-ar age of 0.23 ± 0.02 ma (fan et al 2002).

The volcanic cone by basalt lava, volcanic slag quality, a volcano-gravel, and volcanic bombs, and iron-magnesium form rock package. Its age is Th U - age 71 ±9 KA (Yu et al, 2003), and K - Ar age ( 0.23 ± 0.02 Ma Fan et al, 2002).

This volcanic cone by the Xuanwu nature lava, the cinder, the volcano angle gravel, the volcanic bomb and the ultra mafic component crag inclusion is composed.It forms the time to have U-Th age 71±9 ka (Yu et al. 2003), with K-Ar age 0.23±0.02 Ma (Fan et al. 2002)。

The volcanic cone composed of basaltic lava, volcanic ash, volcanic rubble, composed of volcanic bombs and xenoliths of ultramafic rocks. Its formation age of U-Th age 71 ± 9 Ka (Yu et al. 2003), and k-ar ages of 0.23 ± 0.02 Ma (Fan et al. 2002).

正在翻译，请等待...