求翻译：四周湖垣最大高程为624 m，具有一个完整的、封闭性很好的相对高度约10-20 m的火山岩环状垣，主要由玄武质火山碎屑岩组成，含大量的玄武质火山渣，火山渣中夹有一些熔岩角砾及岩块，熔岩中含有大量的石榴石二辉橄榄岩包体(Liu, 1999; Liu et al, 2000)。由下至上火山碎屑岩呈粗细粒度交替的粒序层形式，火山碎屑岩的水平层理发育(Zhao et al, 2008)。是什么意思？

Four weeks Lake Yuan maximum elevation is 624 m, with a complete, closed well the relative height of about 10-20 m of volcanic ring Yuan, mainly composed of basaltic volcaniclastic rocks that contain large amounts of basaltic scoria, there are a number of lava breccia and rock scoria, lava contains

Week 4 the largest wall Lake elevation is 624 m, with a complete and closed a very good relative height of about 10 - 20 M of the ring-shaped volcanic rock wall, mainly by basalt rock quality volcanic debris, contain a lot of volcanic basalt-quality Java Volcano in Java with some gravel and lava-lav

All around the lake wall maximum elevation is 624 m, has one completely, the closeness very good height above airport approximately 10-20 m volcanic rock ring-like wall, mainly is composed by the Xuanwu nature pyroclastic rocks, including the massive Xua

Lake ruins around the maximum elevation is 624 m, with a complete, closed is very good about 10-20 m of relative height circular ruins of volcanic rock, composed mainly of basaltic pyroclastic rocks, containing large amounts of basaltic volcanic slag and cinders in the rubble and caught some lava ro