Landslides in Klamath County Landslides are some of the most common and destructive natural hazards in Oregon. Annually, landslides cause millions of dollars of damage across the state. A number of factors, including climate, geology, and topography, make areas in and west of the Cascade Mountain Range particularly susceptible to this natural phenomenon. Additionally, expanding population growth has driven residential development onto steep slopes and other landslide-prone areas. Resultantly, an increasing emphasis has been placed on landslide research and mapping efforts. One such effort is the Statewide Landslide Information Database for Oregon (SLIDO). This project serves as a database of mapped landslides across the state and was created
The Don Valley Brickwork consists of many different layers of geological deposits, allowing us to observe and have a better understanding of how the sediments we see today are formed. The most bottom layer in the Brickworks are from the Georgian Bay Formation, and consists of grey- shale bedrocks. Fossils are often found in this layer and it is estimated that this deposit of sediments is around 445 million years old. Above the bedrocks is a thin layer of grey clay sand and gavels left behind by the Illinoian Glacier. This layer is called the York Till and occurred around 135,000 years ago. The next layer consists of a sandy deposit called the Don Formation, which is formed by the Sangamonian Interglacial Stage. Many plant and animal fossils are found in this layer due to warmer climate around 120,000 years ago. Above it lies the Scarborough Formation, which consist of clay and sand. This sediment likely occurred 115 - 106,000 years ago. The next layer above is the Poetry Road Formation, and consist of sand and gravel. This layer is likely formed during the early Wisconsin glacial substage around 106- 75,000 years ago. Higher is the Sunnybrook Drift which was formed 60 – 75,000 years ago. And on the surface, is the Halton Till, which was left behind by the final push of the Wisconsin Glacier.
Bonnett, Gabrysch R.K. and C.W. "Land Surface Subsidence at Seabrook, TX ." US Geological Survey. Seabrook TX: Water Resources INV, 1975.
MILLER, C. D. POTENTIAL HAZARDS FROM FUTURE ERUPTIONS IN THE VICINITY OF MOUNT SHASTAVOLCANO, NORTHERN CALIFORNIA. N.p.: US Government Printing Office, 1980. Print.
Although volcanoes are difficult to predict, geologists have made many efforts in order to caution the people of Orting and other surrounding towns of possible lahar slides. Residents have been made aware of emergency response plans and they know the proper precautions to take in the case of a volcanic activity emergency. Sirens have been put into place by the fire department and governing bodies of surrounding communities that detect volcanic activity and warn the community of ...
The west coast of the islands is on the edge of a continental shelf created by ancient volcanic movement (Broadhead 5) .This volcanic activity is due to plate tectonic movement which also created the numerous amounts of earthquakes on the island. Compared to the rest of British Columbia, Haida Gwaii has the most earthquake activity (Broadhead 5), the last of which being in a magnitude of 7.7 on t...
An earthquake felt throughout the Midwest on June 18 was a shaky reminder that earthquakes can occur anywhere.
Boom! A once ice-capped mountain peak explodes as ash fills the air. “‘Vancouver, Vancouver, this is it!’”Those were the last words of expert geologist David Johnston (Gunn 561). In 1980, Mount Saint Helens of the state of Washington erupted, filling the air with ash and causing mudflows powerful enough to lift tons. It decimated everything in its path. The eruptions, mudflows, and ash caused great damage on the landscape, yet it gave us information on how catastrophes happen and how they affect society and the surrounding landscape. The data acquired can also help us understand the way the landscape was formed. Mount Saint Helens caused much damage, but also helped people understand the science behind it.
Oregon, J. C. (2013, April). Jackson County Oregon . Retrieved April 15, 2013, from http://www.co.jackson.or.us/index.asp
The first time I saw Mt. Rainier for myself, was last summer when my boyfriend and I drove to Washington. It was the most beautiful, peaceful looking mountain I have ever seen. However, underneath it's great beauty, it hides a deadly secret. Mt. Rainier is one of the most dangerous volcanoes that we have here in the United States. One of the reasons it is so dangerous is because of it's great beauty. People enjoy looking at it, and the area that surrounds it, so they have made their homes here. Mt Rainier is not the only volcano I am interested in, in fact this last summer I also went to Mt. St. Helens and Crater Lake. But it is the volcano I chose to research for this paper because it does have so much beauty and at the same time so much power. I already know the basics about volcanoes, how they form, the different types, etc., but I wanted to find out more about what would happen if this great volcano were to erupt, what type of eruption would it be, and how would it affect the people that live around it.
The granite in the Sierra Nevada Range and the glacier-carved landscape of Yosemite National Park allows the geologic history of the area to be broken into two distinct parts. First, the deposition and deformation of metamorphic rocks and emplacement of granitic rocks during the Paleozoic and Mesozoic, and secondly, the uplift, erosion, and glaciation during the Cenozoic that produced the modern landscape (United States of America). Significant chapters in this geologic history include the assembly of California, the intrusion of the Sierra Nevada Batholith, building of the Sierra Nevada, and erosion by glaciers (United States of America). The glaciation has led to iconic landmarks that are known around the world, such as Yosemite Falls, Yosemite Valley, and Half Dome (United States).
The Mauna Loa volcano is located in Hawaii and means "Long Mountain" in Hawaiian. It is a giant, basaltic shield volcano. It is one of the largest volcanoes and mountains in the world and has been called the "monarch of mountains". It has an estimated volume of 9,600 cubic miles and takes up half the land of Hawaii. It extends about 120 km starting from the southern tip of the island to the northern region. It is 97 km (60 miles) long, 48 km (30 miles) wide, and is 8,742 km (28,680 miles) high from the base on the sea floor to the top. The slopes are steeper than 12 degrees and about 4 degrees at the top of the volcano. Mauna Loa formed about half a million years ago and in the middle stages of forming into a shield volcano where lava flows to form a sloped and broad flat domed volcanic cone. Along with Mauna Kea, the Mauna Loa volcano is responsible for the creation of the Hawaiian Islands. Mauna Loa has erupted thirty-three times since 1843 and is known as one of the most active volcanoes in the world today. The last eruption was 1984 and lava flowed within 4 miles of the city of Hilo. This shows that it is dangerous to live anywhere near Mauna Loa and that it poses as a threat to anyone living near it because it has a very high possibility of erupting within a very short span of time. Below is a picture of Mauna Loa taken from a bird's eye view.
Over the weekend, I chose to travel to Baldwin Hills Scenic Overlook as my area of research, since I have never been there despite living in northeast Los Angeles almost my entire life. Upon arriving at Baldwin Hills, the first topographic and natural elements I noticed was the area was covered in grassland, which contained numerous small shrubs and trees. This provided a stark contrast compared to the rest of the city below the hillside and overlook, which had minimal vegetation and consisted mainly of man-made buildings, roads, infrastructure, and cement. Immediately, I noticed the extremely high altitude in comparison to the large expanse of flat land that surrounded the mountain on all four sides. A large telephone or satellite pole protruded from one side of the hills, which appeared
Landslides Warning System INTRODUCTION Landslides are the down slope movement of mass of land, rock, soil, or related debris. In most mass movement, water plays a pivotal role by assisting in the decomposition and loosening of rock, lubricating rock and soil surfaces to enhance the beginning of movement, adding weight to an incipient landslide, and imparting a buoyancy to the individual particles, which helps overcome the inertia to move. Landslides can also be triggered from volcanic eruptions and earthquakes, which initiate earth movement on a grand scale. Landslides are frequently the direct consequence of human activity. They are predominant in highland areas where Agricultural irrigation and forestry practices such as clear-cutting and stripping vegetation from naturally oversteepened slopes are eminent.
Living in Bangladesh, we have seen quite disastrous mudslides from the past few years. Mudslide is also called a landslide or a land slip. It is a downward mass movement of earth or rock on unstable slopes, including many forms resulting from differences in rock structure, coherence of material involved, degree of slope, amount of included water, extent of natural or artificial undercutting at the base of the slope, relative rate of movement, and relative quantity of material involved. There are numerous facts that can cause a mudslide and there are also numerous effects that it can cause us.
Earthquakes belong to the class of most disastrous natural hazards. They result in unexpected and tremendous earth movements. These movements results from dissemination of an enormous amount of intense energy in form of seismic waves which are detected by use of seismograms. The impact of earthquakes leaves behind several landmarks including: destruction of property, extensive disruption of services like sewer and water lines, loss of life, and causes instability in both economic and social components of the affected nation (Webcache 2).