Lava flowing in liquid state on the earth's surface is called lava flow, which forms solid rock accumulation after cooling, sometimes called lava flow. The temperature of liquid lava is often between 900 ~ 1200℃. If there is a lot of gas in lava, it can flow at a lower temperature.
Acid lava is viscous and won't flow far, and large-scale lava flow is often alkaline lava. When the temperature is high and the slope is steep, the velocity of lava flow can reach 65 kilometers per hour.
The shape of lava flow depends on many aspects, such as lava composition (basalt, andesite, dacite, rhyolite), velocity, topography and environment.
Complete spell: Long Yan
example sentence
1, sometimes lava comes out and generates, resulting in huge blasting pressure.
2. Volcanoes in the Cascade Mountains in Washington also emit such lava.
3. The active volcano spews smoke and lava.
If lava sinks into this passage, a crater will be left on the top of the mountain.
Magma refers to hot magma formed after underground rocks are melted, but it is not ejected from the surface underground.
Lava is a volcanic rock formed by magma spewing out of the surface.
Magma is the parent of lava, which is ejected from the surface to form volcanic rocks, including lava (such as basalt and rhyolite) and clastic rocks (such as tuff); Those that do not gush out of the surface are called intrusive rocks, such as granite, and igneous rocks. In other words, igneous rocks are all formed by magma. In addition, our crust is full of magma all the way to the core.