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频繁的活动，使其陡峭的山坡覆盖有火山喷发岩。
As a result of its frequent activity, the steeply sloped peak is coated with lava.
大别造山带北部的北淮阳中生代火山喷发岩带形成于后造山阶段的晚侏罗世—早白垩世。
Mesozoic volcanic eruption belt, which locates on Beihuaiyang area in northern part of Dabie orogenic belt, formed at post orogenic stage during Late Jurassic to Early Cretaceous.
山顶有小圆形火山口，直径大约1千米，周围是80到300米高的墙（喷发岩形成的）。
A small circular caldera crowns the volcano. A little more than a kilometer across, the caldera is defined by walls that range from 80 to 300 meters high.
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