
Gerald E. answered 05/03/19
Retired oil industry geologist with university teaching experience
No, you will not see an orange line of lava if you look down along the entire length of a divergent tectonic boundary. However, if you're lucky you will see lava coming out of the earth in volcanoes or along fissures over distances of 1 km or less. You might get to see both in Iceland, which lies on top of the divergent mid-Atlantic Ridge and was formed by lava emerging from fissures and small volcanoes. Divergent boundaries on land (i.e., East Africa Rift Zone and Ethiopia) have lava extrusion along minor fissures and shield volcanoes.