他们通过使用麦哲伦航天器的数据去估计火山活跃地区熔岩流的体积，最终确定了这些熔岩流的时间范围。
They determined this range by using Magellan data to estimate the volume of the lava flows in the hot spot regions.
他们发现沙莰基隆起是由很多层硬化的熔岩所组成，其中个别熔岩流的厚度竟达75英尺(23米)。
They found Shatsky Rise is made up of layers of hardened lava, with individual lava flows up to 75 feet thick (23 meters).
当非常黏滞的稠密熔岩流经陡峭的地表时，就形成了熔岩流。
Coulees are formed from highly viscous, thick lavas that flow onto a steep surface.
应用推荐