When the cinder cone volcano is being explain (starting at about 50 seconds) the diagram shows a cross section of a multi-layer cone. At about 58 seconds the narrator says that cinder cones are usually formed from a single eruption. In that case, how does one account for the layering shown in the diagram? Are there multiple phases to that single eruption, with each phase producing a different type of material? Also, why would there only be a single eruption? What are the odds that all of the internal pressure and material will be released at once? It's not like it's going to suddenly get cold down there where all that heat came from.
Very keen eyes you have, I think it is a somewhat artistic license being used by the diagram, according to the source materials it is to illustrate layers of ash cooling and more landing on top, not necessarily over long periods. If you have a Google search about half are layered half are not.
Cinder cones generally generally have single eruptive episode. After an eruption has ended, the plumbing system connecting the magma source area to the vent is blocked by rock (e.g., solidified magma).
It is also worth noting that eruption events are not quick, they can last weeks or months, which is more than enough time for material to cool and form layers.
@@classroomnation-geography7445 Well, okay, but isn't "blocking of the plumbing system" the very condition that lets pressure build up until there is a gigantic explosion?
