Lava Plain Diagram. The following picture shows features on our moon. These eruptions are quiet because of low viscosity of lava so that it is very fluid.
I honestly have no idea. The volcanic igneous rocks occur as lava flows. These plumes of material have the ability to drift moderate distances away from the eruption site.
Lava rock and ash are propelled up to 20 kilometers 124 miles in the air although most eruption columns are between 5 and 10 kilometers high.
The dark earth is a result of the lava mostly a dark colored mineral called basalt broken down into tiny particles over millions of years. Compare the craters marked a with the lava plain marked c. The volcanic rock resulting from subsequent cooling is also often called lava. Which is older a or c.