Lava dome

Basaltic lava has a low viscosity and that is why the lava flows more freely making it slow over a wide area. Lava caves can be formed when lava begins to harden. If we were to look closely to the lava that just came out of the volcano, you can tell when it is cooling and hardening. Lava trees can be created when lava flows around trees, which the burn leaving hollowed out regions in the lava according to their shape. By looking at the Lava trees you can tell how the forest…

field and was formed by three volcanic cycles. Two of these were the largest known eruptions on Earth. After each “mega-eruption” there was a period where smaller eruptions of pyroclastic materials and rhyolite lavas continued to extrude into or around the newly formed caldera (USGS,52).The Lava Creek Tuff eruption is the youngest of the three volcanic cycles that formed the Yellowstone Plateau and one of the largest. Its eruption 640,000 years ago ejected 1,000km3 of material into the…

Volcanoes: Destruction Makers Natural disasters are tragic events caused by nature that have a negative impact on man. Volcanoes can be considered one of the worst types of natural disasters because they often kill people, injure people, and/or destroy property. One example of a volcano is Mount Saint Helens. “A volcano is an opening in Earth’s crust through which ash, gases, and molten rock from below ground erupt onto Earth’s surface or into the atmosphere” (Kobasa). Volcanic eruptions…

These amazing beautiful towers of volcanoes on the ocean floor vary in every way which only makes them more mysterious and fascinating. The first discovery of a hydrothermal vent was aboard a 3-person submersible named Alvin in 1977 at the Galapagos Rift (WHOI, 2004). This vent was a discovery of warm fluids mixing with cold ocean water rising from the ocean floor crust (WHOI, 2004). “In 1979, a second hydrothermal system was discovered along the East Pacific Rise” (WHOI,2004). This discovery…

On August 26, 1883, a catastrophic natural disaster happened that affected the lives of people near and far. The volcano, Krakatoa, erupted leaving a great deal of devastation in its wake. Krakatoa is a volcanic island located in the Sunda Strait along the Indonesian Island Arc. The island along with two others were remains of an earlier eruption from two hundred years before. Krakatoa Island had three large hill-like or mountain shaped volcanic cones named Rakata, Danan, and Perboewatan. Before…

Mount Vesuvius – Italy Hypothesis: The impact of active volcanoes overlooking settlements pose as huge threats. With eruptions of volcanoes comes mud, ash and rocks leading to settlements being buried under the debris. Volcanoes also lead to lava flows and ash-and-gas explosions which damage and destroy many settlements/towns around the volcano. In worst case scenarios, eruptions of volcanoes lead to death of people and wildlife. Therefore we can deduct that a volcano is a geographical problem…

“Vancouver! Vancouver! This is it!” Those were the last words anyone heard from David Johnson. He had been closely monitoring a steaming, trembling snow-capped mountain near Vancouver, Washington. Mount St. Helens had not erupted in over 100 years. But two months earlier, an earthquake had jolted it to life. Homes were evacuated and roads were closed as hundreds of explosive blasts of steam burst from the volcano and earthquakes shook the area. Scientists knew that pressure was building up…

1 Introduction Since the eruption in 1980, the area around Mount St. Helens has rebounded in ways that were somewhat unexpected, with recovery coming not only from the surrounding area, but from within the barren expanse that remained after the eruption. While not the first eruption overall, this eruption was the first to occur on the U.S mainland in a time when modern scientific monitoring could track the events associated with it. Smaller earthquakes in March of 1980 eventually led to the…

Loowit to the Klickitat. Mount St. Helens is an active stratovolcano or composite volcano, a steepsided and often symmetrical cone constructe. Thess type of volcanoes tend to erupt explosively and pose considerable danger to nearby life and property of lava flows, ash, and other volcanic debris. Mount St. Helens takes its English name from the British diplomat Lord St. Helens in the late 18th century. The last eruption was on March 20, 1980. A 5.1- magnitude earthquake hit Mount St. Helen…

also created one of the biggest volcanic eruptions in it’s continent own continent. Towering at an outstanding 1 277 m or 1.277km in length. This volcano is known to demolish valley’s and places near it at an instant, due to it’s heavy and continuous lava flow when it has erupted. Mt Vesuvius is also well know for it’s toxic ash and debris because these substances caused the bodies of many people in Pompeii to rot. The last eruption of Mt Vesuvius was in…