求翻译：中更世火山又有喷发，且以中心式爆发为主，形成大量橄榄玄武岩、玄武质集块岩和火山碎屑岩，筑成小椅子山火山锥，K-Ar年龄为0.68-0.05 Ma (Fan et al. 2002)。是什么意思？

And the more the world volcanic eruptions, mainly to the outbreak of the central type, the formation of a large number of olivine basalt and basaltic agglomerate and pyroclastic rocks, built into a small chair volcanic cone, k - ar age of 0.68-0.05 ma ( fan et al. 2002).

In the volcanic eruption, and there is also a center-based outbreaks, and formation of large basalt-olive, Hyun moo-quality rock and volcanic rock debris, and build a small chair K volcano cone, Ar age - 0.68 - 0.05 for Ma Fan et al ( 2002 ) . .

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More volcanic eruptions, with centralized mainly broke out, form a set of massive olivine basalt, basaltic rock and pyroclastic rocks, into a small chair mountain volcanic cone, K-Ar age of 0.68-0.05 Ma (Fan et al. 2002).

The world volcano also has the eruption, also by the central type eruption primarily, forms the massive olivine basalt, the Xuanwu nature agglomerate and the pyroclastic rocks, builds the small chair mountain volcanic cone, the K-Ar age is 0.68-0.05 Ma (Fan et al. 2002)。