求翻译：西大甸子旱玛珥位于辉南县金川乡西，是本区见到的最大的旱玛珥，海拔618 m，近圆形，平面面积约0.85 km2。四周的火山岩垣相对高度为10 m 左右，主要由玄武质火山渣及玄武质熔岩组成，产状向四周倾斜，倾角为15°-25°。是什么意思？

The West Dadianzi Maar in Huinan County, the Jinchuan Township West, drought Maar for this area to see an altitude of 618 m, nearly circular, flat area of ​​about 0.85 km2 in The surrounding volcanic rocks Yuan relative height of about 10 m, mainly composed of basaltic scoria and basaltic lava, occu

West Austin sub islands ecological communities located in Huinan Kim township West, is the area to see the largest of the islands of ecological communities, at an altitude 618 M, near round, flat area of about 0.85 km2 . 4 weeks of volcanic rock wall height is about 10 M, the volcanic basalt-quality

West big grassland dry Masurium arc of contact of halo is located west the Huinan county Jinchuan township, is biggest dry Masurium who the home court saw arc of contact of halo, elevation 618 m, near circular, plane area approximately 0.85 km2.The all around volcanic rock wall height above airport

West meadow Sub Aqua Maar in huinan County Jinchuan Township West, is the largest in this area see Aqua Maar, 618 m above sea level, near-circular, flat area of 0.85 km2. Four week-long volcanic ruins the relative height of about 10 m, mainly formed by basaltic lava and basaltic cinders, occurrence

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