Rootless cones can also be formed in lava flows when lava flows over wet sediments and vapor explosions open up the more less solid crust of the lava flow allowing spatter, tuff or cinder to be ejected.
Rootless cones can also be formed in lava flows. Lava flows over wet sediments. Vapor explosions open up the more less solid crust of the lava flow. Vapor explosions were allowing spatter, tuff or cinder. This was to be ejected.