1. The lava flows erupted by the fissure vents are formed by trachybasalt. 2. Volcanic activity at Anyuyskiy commenced at long fissure vents , forming lava flows. 3. The activity occurred at high temperatures and was issued by fissure vents . 4. The basalts issued from fissure vents primarily located peripheral to the calderas. 5. Sazeleti is a lava cone, the other two volcanoes are fissure vents . 6. Ten satellite cones and fissure vents lie on the flanks of the volcano. 7. Some of these fissure vents are exposed, forming ridges of lava. 8. The island is of volcanic origin, mostly made of fissure vents . 9. However, fissure vents occur on both ( mainly the west ) sides of the volcano. 10. Fissure vent Shield volcano Lava dome Cinder cone Stratovolcano Supervolcano Submarine volcano Subglacial volcano Mud volcano
