| 1. | Basalt is the commonest volcanic rock .
玄武岩是最普通的火山岩。 |
| 2. | The volcanics are most commonly andesitic in composition .
火山岩的组成最通常是安山岩。 |
| 3. | Volcanic rocks have high susceptibilities under normal conditions .
火山岩在正常情况下有强的磁化率。 |
| 4. | Fossils embedded in or between the volcanic layers can thus be dated by this method with great accuracy .
火山岩层间夹合的化石层可使这种测定年龄的方法极为精确。 |
| 5. | Rock fragments, including volcanics, are common, and the matrix consists largely of kaolin and illite .
常见有岩石碎块，包括火山岩屑，基质大部分为高龄土和伊利石。 |
| 6. | These gravity anomalies correspond to positive aeromagnetic anomalies and are interpreted as being due to buried volcanic or intrusive rock .
这种重力异常和航磁异常相符，其原因可能是有隐伏的火山岩和侵入岩。 |
| 7. | Its reservoir is glutenite and volcanic rock .
储层除砂砾岩外，还有火山岩。 |
| 8. | In many countries , clay was formed from volcanoes
在许多国家，粘土来自于火山岩。 |
| 9. | In many countries , clay was formed from volcanoes
在很多国家里，粘土在火山岩形成。 |
| 10. | Volcanic reservoirs are closely related to fractures
火山岩油藏与裂缝有密切的关系。 |
