Field studies indicate that nearly all eruptions in volcanic edifices and rift zones are supplied with magma through
 fractures (dykes) that are opened by magmatic overpressure. While (inferred) dyke injections are frequent during unrest
 periods. volcanic eruptions are. in comparison. https://cnajyotxv9m6we.blog-kids.com/35130553/digital-games-and-learning-mathematics-student-teacher-and-parent-perspectives