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.
1 Lava is molten rock expelled by a volcano during an eruption. 2  A lava flow is a (moving) outpouring of lava, which is created during a non-explosive effusive eruption. 3  When it has stopped moving, lava solidifies to form igneous rock.The composition of a lava determines its behavior more than the temperature of its eruption. The viscosity of lava is important because it determines how the lava will behave. Island-arc magmas are generated in metosomatically altered mantle.hen it has stopped moving, lava solidifies to form igneous rock. The composition of a lava determines its behavior more than the temperature of its eruption. The viscosity of lava is important because it determines how the lava will behave.