Over millennia, lava eruptions building up from miles below the ocean surface created each of the state's eight major islands and hundreds of islets.
12.
In 1995, scientists reported that a spate of undersea quakes and lava eruptions had preceded the onset of the El Nino cycle then in effect.
13.
Lava eruptions later created a central platform, Wizard Island, Merriam Cone, and other, smaller volcanic features, including a rhyodacite dome that was eventually created atop the central platform.
14.
After another period of erosion, a series of lava eruptions from fissures across northeastern Oregon, southeastern Washington, and western Idaho inundated much of the Blue Mountain province with liquid basalt.
15.
Substantial volcanic activity also characterises the landscape west of Vatnaj�kull, where two of the world's greatest fissure and lava eruptions of historical times occurred, at Eldgj?in 934 and Lakag�gar 1783-1784.
16.
Platania left record of the 1669 lava eruption of Mount Etna, depicting the event in frescoes in the sacristy of the Cathedral of Catania, that unfortunately suffered damage and poor restorations.
17.
This caldera has been almost entirely filled by subsequent lava eruptions, but is still visible as a distinct break in the slope of the mountain near the base of the present-day summit cone.
18.
The covering layer of dark basalt was formed from magma and lava eruptions in the Jurassic period between 175 and 208 million years ago as chabazite and stilbite can also be found at Partridge Island.
19.
Usually basalt is too hot and fluid to build up sufficient pressure to form explosive lava eruptions but occasionally this will happen by trapping of the lava within the volcanic throat and buildup of volcanic gases.
20.
Its lava flows are less extensive than the ones of Llullaillaco I . Pyroclastic flow deposits with a composition similar to Llullaillaco II are found on the southern slope of the volcano and may have formed before the lava eruptions began.
