What does the ancient earthquake detector do? it help tell the direction of where it came from and the slightest movement will make the ball fall if you are referring to the ancient china one Edit
Depending on the type of lava flow, the resulting rocks look very different. This was a pahoehoe flow. A lava flow is caused by a volcanic eruption. The lava can flow down the volcano at speeds ranging from 1/24 to 50 meters an hour. They can be 1,300 degrees fahrenheit or more. They are very destructive.
The way lava flows can be described in terms of the size of the lava flow, the surface texture of the lava flow, and the structural makeup of the lava flow. If the lava features a continuous surface that is smooth, features ropy folds, and if the flow is thin in size, then it is described as a pahoehoe flow.t is liquid in form and is extremely hot. The force of the blast and the viscosity of the liquid causes lava to flow away from the volcano. The composition of lava affects the way it flows, the speed at which it flows, and the resulting rocks that develop when the lava cools.