The Geologic History of Washington State & Kittitas County Jana Jones Mabry.
Volcanoes
Volcanoes and volcanic erruptions
I. Effusive eruptions: relatively quiet, non-explosive mostly basaltic lava, flows freely. A. Central Vent Eruptions— lava flows out (sometimes fountaining)
Proterozoic Neoproterozoic 1 -0.545 bybp Mesoproterozoic 1.6-1 by Paleoproterozoic 2.5- 1.6bybp.
igneous_intrusions-a~-alison_quarterman.ppt
Where do we find igneous rocks? Divergent and convergent plate boundaries Continental margins above subduction zones Island arc volcanic chains above subduction.
When the wave enters shallow water, it slows down and its amplitude (height) increases.
Unit 6: Earth Shaped from the Outside in
Volcanism. Mauna Loa, Hawaii Mt Pelee, Martinque Mt St Helens, WA 1981.
