They tend to explode at the surface. If they produce significant ash, then they are of the continental pyroclastic-type volcanoes of the more viscous andesite-rhyolite-dacite compositions rather than the much less viscous basalt of oceanic volcanoes like those in Hawaii.
Why? Dodo birds give it away, Dodo birds was hunted to extinction because there was no competition of where they lived for their coats and it was very easy to hunt them since they had no self defense.
