MountStHelens.com Information Resource Center History - Mt. St. Helens Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Geologists call Mount St. Helens a composite volcano (or stratovolcano), a term for steepsided, often symmetrical cones constructed of alternating layers of lava flows, ash, and other volcanic debris. Composite volcanoes tend to erupt explosively and pose considerable danger to nearby life and property. In contrast, the gently sloping shield volcanoes, such as those
The last eruption happened in 1984, and we’re certain the volcano will erupt again, but for now we monitor Mauna Loa for any indication of its next eruption. Mauna Loa is named for the sub aerial part that extends 120 km at the southern tip and at the east-northeast coastline, therefore its name “Mauna Loa” meaning “Long Mountain”. Most Recent Eruption: March 24-April 15, 1984 Number of Historical Eruptions: 33 Oldest Dated Rocks: Between 100,000 and 200,000 years ago Estimated Age of Earliest Sub aerial Eruptions: About 400,000 years ago Estimated Age of First Eruption of Mauna Loa: Between 1,000,000 and 700,000 years before present Hawaiian Volcano Stage: Shield-forming stage.Mauna Loa aka Long Mountain in Hawaiian can be found on the island of Hawaii and is rising over 13, 680 ft. above sea level. The volcano has erupted 33-39 times, 1984 is the last time Mauna Loa has erupted. Mauna Loa has an estimated time of six years between each eruption, but on March 25, 2009 The Hawaiian Volcano Observatory celebrated the 25th anniversary of the volcanoes last eruption in 1984.
Glacial activity helped to form the basins and paths for the many lakes, which contribute to Canada’s beautiful landscape. The climate in the northern part of the Canadian Shield is long, cold winters and short, warm summers. The southern part of the Canadian Shield has cold, snowy winters and warm summers. In summary landscape of the shield can be described as rocky with many different types of bodies of water. Great lakes St. Lawrence lowlands Great lakes and st.lawrence low lands began formation in the Paleozoic era and continued forming during the Cenozoic era.
National Geographic: Secret Yosemite National Geographic: Secret Yosemite is a documentary that delves into the magical Yosemite National Park in Northern California. The park is known for its spectacular granite cliffs, breathtaking waterfalls, and majestic Giant Sequoia trees. El Capitan and Half Dome are among its most famous and widely know cliffs. Yosemite Falls, one of the highlights of the national park is thirteen times higher than that of the Niagara Falls. The tremendous Sequoia trees are as high as a 30-story building and wider than most city streets.
Where are the Andes? The Andes Mountains are the longest and one of the highest mountain ranges in the world. They are located in South America and stretch 4,500 miles from north to south, along the west coast of the continent. - What is the landscape like? The landscape is very mountainous and quite bare however it does have a lot of snow at the peaks and high altitudes.
SSCI 110 November 2011 Yosemite Introduction Yosemite National Park is without a doubt, one of America’s most beautiful and well-known parks. Due to the diversity of attractions the park offers, including high Sierra Peaks, the highest highway pass in California called the Tioga Pass, the Yosemite Valley, the Merced River, acres of high altitude backcountry, waterfalls, and some of the largest living things on earth in the sequoia groves tourists from all over the world visit. The most famous section in the park is Yosemite Valley, where El Capitan, Half Dome, Yosemite Falls, and other places to explore nature’s beauty lie. Yosemite Geography Yosemite National Park is located in the Central of the Sierra Nevada Mountain Range
Wegener's theory also provided an alternate explanation for the formation of mountains (orogenesis). The theory being discussed during his time was the "Contraction theory" which suggested that the planet was once a molten ball and in the process of cooling the surface cracked and folded up on itself. The big problem with this idea was that all mountain ranges should be approximately the same age, and this was known not to be true. Wegener's explanation was that as the continents moved, the leading edge of the continent would encounter resistance and thus compress and fold upwards forming mountains near the leading edges of the drifting continents. The Sierra Nevada Mountains on the Pacific coast of North America and the Andes on the coast of South America were cited.
J. Subbiondo © 2004The CrustThe outer layer of the Earth is called the crust. It is made up of rock that floated to the surface when the Earth was formed. It is not a continuous layer, but is made up of large masses called tectonic plates.These plates drift slowly across the Earth's surface (tectonic means moving).The movement of these plates creates mountains and valleys.At weak points in the crust, it causes volcanic eruptions. And when plates bump into each other, earthquakes occur -- emitting shock waves or vibrations called seismic waves. The crust is the Earth's coldest layer.
Lima is the country’s capital and chief commercial center. The population of Peru is 27 million. Lima is the capital and has a population of 8 million. Its highlands account for 36 percent of the remainder. The primary resources of Peru include petroleum, found on the northwestern coast and in the Amazon Basin; cooper in northwestern Peru; and substantial deposit of silver, iron, ore, gold, lead, and zinc throughout the cordilleras.
Medial moraines are surface ridges of material near the middle of a glacier, and crevasses are wedge-like cracks in the surface of a glacier or of an ice sheet. A glacier table is a large block of stone resting on an ice pedestal, and cryoconite holes are a result of small quantities of dust on the ice that does not insulate, but instead conducts heat to the ice beneath it and creates an almost vertical hole (Nichols 2). Glaciation is the covering of land by glacial ice, and evidence of glaciation has been found in at least five stretches of geologic time: in the middle of the Huronian era in Precambrian time; at the end of the Proterozoic Era; the middle of the Paleozoic Era between the Ordovician and Silurian Periods; the late Carboniferous and early Permian Periods in the late Paleozoic