volcanic crater

1. There are many noticeable and well-developed joints in the volcanic crater group in the Changle area, and they are unique in shape.
   山东昌乐地区死火山群火山通道相节理非常发育，形态独特，引人注目。
2. Because it wasn't formed during volcanic activity, the walls of the crater are composed of sedimentary rather than volcanic rock.
   因为他不是在火山活动期间形成的，弹坑的外壁是由沉积岩而不是火山石组成的。
3. The fractures radiating from the volcanic crater are the ore-distributing passageways, which let the ore-forming material move into the host structures and the deposit.
   放射状断裂是沟通火山通道和火山周边断裂并使含矿热液从火山通道向火山周边断裂运移的重要渠道，起到配矿构造的作用。
4. The favorable volcanic reservoir mainly develops near crater facies belts.
   有利的火山岩储层多发育在近火山口相带。
5. If too much volcanic heat is discharged, the crater's ice pack will melt away entirely and the caves will vanish along with the snows of yesteryear.
   如果太多的火山热量被释放，火山口的浮冰群将会完全消失并且洞和几年前的雪一起消失。
6. A lake of southwest Oregon in a volcanic crater of the Cascade Range.
   美国俄勒冈州西南部喀斯特山脉一个火山凹湖。
7. It's actually a collapsed volcanic crater, and below the water the volcano bides its time.
   它实际上是倒坍的火山口，在湖水下面，火山蓄势待发。
8. The accumulation of deep gas is controlled by the volcanic apparatus, which consists of3 elements: volcanic plateau, pericline and crater, all having clear seismic reflective characteristics.
   火山机构由3个基本要素组成，即火山堆积高地、围斜构造和火山口，在地震剖面和水平切片上反射特征明显。
9. With regard to the genesis of perlite deposits, it is considered conventionally that "perlite is a glassy rock which is formed by rapid cooling of the acidic lava erupted from volcanic crater".
   但关于珍珠岩矿床的成因，习惯认为：珍珠岩是由火山口喷发的酸性熔岩，经急速冷却而成的玻璃质岩石。
10. The characters of volcanic vent facies and invading facies are steep mound shape with middle-high amplitude, low frequency, disorder reflection, only occurred near the crater, which are 2 km wide and 100~ 200 m thick.
    而火山通道相和侵出相呈（陡）丘状、中强振幅、低频、杂乱反射，仅分布在火山口附近，横向宽多小于2km，纵向厚约100~200m。
11. What's more, Changyi volcanic group should have other crater basins also with diatomite.
    此外，昌沂火山群还应当有其它发育硅藻土沉积的火山口盆地。
12. We introduced the tourism resources of the Volcanic Crater National Forest Park. In order to provide the evidence of developing the tourism resources of the park. its area position was evaluated basing on three aspects: the geographic area.
    简单介绍了火山口国家森林公园的旅游资源.并从地理位置、旅游资源和客源市场三方面对其区位条件进行了评价.旨在为进一步开发火山口国家森林公园的旅游资源提供依据。
13. Volcanic edifice is divided into three facies belts which are crater-near crater facies ( CNCF), proximal facies ( PF) and distal facies ( DF).
    将火山机构分为火山口-近火山口相（CNCF）、近源相（PF）和远源相（DF）三个相带。

noun

1. a bowl-shaped geological formation at the top of a volcano

   Synonym:    crater