Geometry.Net - Basic_L: Landslides

Geology Of Mars } Landslides
Mass Movements Mass movement (commonly referred to as landslides) representsa geological process where surface materials move downhill by gravity.
http://www.lukew.com/marsgeo/landslides.html

Extractions: Mass movement (commonly referred to as landslides) represents a geological process where surface materials move downhill by gravity. Most of the Martian mass movements occur in Valles Marineris, the Grand Canyon of Mars. Figure 2.1 shows a section of a collapsed canyon wall. At the top of the picture, a rock avalanche at the three curved walls is clearly visible. There is also a large amount of debris accumulated at the foot of the walls. A close-up view of the central curved wall is shown in Figure 2.2 . The fan-shaped feature at the bottom is the front of a debris flow on the valley floor. Figure 2.3 is another view of debris that piled up to modify the valley floor on a large scale. Notice the lineated tectonic grabens on top of the plateau. (Graben represents a downthrown block of land mass produced by horizontal tensions.) The existence of these linear grabens suggests that Valles Marineris was probably formed by horizontal stretching of the regional tectonic stresses. Another interesting feature occurred on the valley floors of the fretted or chaotic terrain as shown in Figure 2.4 . Notice the lineated features on the valley floors. They were probably formed by the debris deposits coming off the steep walls. There may be some slow, glacier-like, down-slope movements parallel to the lineations, but much of the movements are in the direction perpendicular to these linear features.
INVENTORY MAP OF LANDSLIDES
US GEOLOGICAL SURVEY. INVENTORY OF landslides TRIGGERED BY THE. MAPPING landslidesTRIGGERED BY THE EARTHQUAKE. DISTRIBUTION AND TYPES OF landslides TRIGGERED.
http://pubs.usgs.gov/of/1995/ofr-95-0213/TABLE.HTML

Extractions: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY INVENTORY OF LANDSLIDES TRIGGERED BY THE 1994 NORTHRIDGE, CALIFORNIA EARTHQUAKE by Edwin L. Harp and Randall W. Jibson Open-File Report 95-213 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. USGS Denver, CO 80225 TABLE OF CONTENTS MAPPING LANDSLIDES TRIGGERED BY THE EARTHQUAKE ...
Nearctica - Geophysics - Avalanches And Landslides
Geophysics Avalanches and landslides. Return to Geophysics Main Page. Current avalancheconditions in Canada and accident information. landslides AND MUDSLIDES.
http://www.nearctica.com/geology/avalan.htm

Extractions: Geophysics - Avalanches and Landslides Return to Geophysics Main Page AVALANCHES Cyberspace Snow and Avalanche Center . Jim Frankenfield. This site is a good place to start if you are interested in avalanches. You'll find articles on avalanches and avalanche safety. Current conditions are also featured along with an index to photographs of avalanches on the web. There is a little of everything here. Recommended. Avalanche Information . Rocky Mountain Hiking. An introduction to avalanches, stability evaluation, and avalanche safety. Recommended. Avalanche . Nova Online. This web site is primarily a history of the making of a show for NOVA on PBS. It also has, however, segments on avalanches in general and a primer on avalanche safety. Westwide Avalanche Network . A miscellaneous collection of information and links related to avalanches and avalance safety. Swiss Federation Snow and Avalanche Research Davos . This site is a great resource for the physics of avalanches and avalance safety. Colorado Avalanche Information Center . Basic avalanche information, current avalanche conditions in Colorado, and some very nice avalanche photographs.
American Red Cross- Mudslide
landslides are a serious geologic hazard common to almost every statein the United States. It is estimated that nationally they
http://www.redcross.org/services/disaster/keepsafe/landslide.html

Extractions: Landslides are a serious geologic hazard common to almost every state in the United States. It is estimated that nationally they cause up to $2 billion in damages and from 25 to 50 deaths annually. Globally, landslides cause billions of dollars in damage and thousands of deaths and injuries each year. Individuals can take steps to reduce their personal risk. Know about the hazard potential where you live, take steps to reduce your risk, and practice preparedness plans.
Oxford Brookes - 8307 Environmental Geology - Landslides
8307 Environmental Geology. Landslide hazards. Landslide scar left by thehillside failure following the 1959 earthquake at Hebgen Lake, Montana.
http://www.brookes.ac.uk/geology/8307/landslide.html

Extractions: 8307 Environmental Geology Landslide hazards Landslide scar left by the hillside failure following the 1959 earthquake at Hebgen Lake, Montana. Image: Roger Suthren Under construction. This page will be updated frequently Recent articles in New Scientist Thanks to Angela de Stefano for many of the links below. Alberta's Frank Slide Interpretive Centre - Home Page
Landslides, Logging, Roads, Rain And Streams
Streams, landslides, Logging, Roads and Rain. Approximately 60 landslides weredocumented in the Cascades and twice that many in the Coastal watersheds.
http://www.efn.org/~jpreed/landsl.html

Extractions: The heavy rains of early Feb 1996, washed more than just new logs into our streams. Here are some reports on what happpened. For a detailed explanation of what happened in the Upper McKenzie Drainage, ie Blue River area, read about the Andrews Forest Flood of 1996 This wasn't an isolated event. There was more destruction in British Columbia and Idaho: The February rains caused a landslide in a clearcut area just above the Silver Creek landing on the McKenzie. The debris torrent scoured the stream bed down to bedrock and took out the boat landing and intrepretive signs. Next time you are in the area, hike up the stream bed and check it out. I think much of the rubble should be left in place as a memorial to show the offsite destruction caused by clearcutting. PCFFA Editor's Note: Three recent studies have linked recent extensive flood damage to clearcutting of timber (particularly on steep slopes) and to the extensive network of logging roads punched into forested regions throughout the Northwest and Northern California. The most convincing study was done by Gordon Grant, a hydrologist with the US Forest Service's Pacific Research Station in Corvallis, OR and Julie Jones of Oregon State University. It is to be published in the April issue of Water Resources Research, the Journal of the American Geophysical Union.
GEOMONITOR ABOUT LANDSLIDES
Top Pages about landslides {page 1}, http//www.fema.gov/library/landslif.htm,http//www.saunderscollege.com/earthscience/landslides/landslides.html.
http://www.geomonitor.net/landslides/

Extractions: Top Pages about landslides http://landslide.dpri.kyoto-u.ac.jp/e-slide.htm http://anaheim-landslide.com/ http://www.tuat.ac.jp/~sabo/lj/ http://seis.natsci.csulb.edu/basicgeo/landslid.html ... http://www.fema.gov/library/landslif.htm http://www.saunderscollege.com/earthscience/landslides/landslides.html
BIBLIOGRAPHY OF CARIBBEAN LANDSLIDES
BIBLIOGRAPHY OF CARIBBEAN landslides. DeGraff, JV, 1987, landslides on Dominica,West Indies Final Report Washington DC, Organization of American States.
http://www.uwimona.edu.jm/uds/Biblio_Carib_Lndslds.html
Landslides In Ohio
landslides in Ohio, landslides in Ohio (GeoFacts No.8); Those DdRedbeds (Ohio Geology article). Geology Hazards Send
http://www.ohiodnr.com/geosurvey/gen/hazards/landslide.htm
Dark Peak Themes - Landslides
contact us, Dark Peak Fieldwork. Introduction to landslides. What they are. Howthey are classified. Why they happen landslides Introduction. What are they?
http://www.art.man.ac.uk/Geog/fieldwork/landslides.htm

Extractions: Links What are they? These terms may be better in some ways because sliding is just one way in which mass movements can happen: rock, debris or soil can also move under gravity by falling or flowing. Block diagrams Mass movement can be classified according to how the movement happens The main types are falls, slides and flows.
Welcome To The Atlas Of Canada / Bienvenue À L'Atlas Du Canada
landslides and snow avalanches have resulted in more than 600 deaths inCanada since 1840, and have caused billions of dollars in damage.
http://cgdi.gc.ca/ccatlas/hazardnet/i_landslide/lslintro.htm
Seattle Geologic Mapping Project
landslides. landslides throughout Seattle, such as those along Perkins Lane (above),have caused severe damage to residential property following heavy rainfall.
http://gneiss.ess.washington.edu/sea-geo/Geologic_Hazards/landslides.htm

Extractions: Home Links References Search Seattle Geologic Mapping Project Kathy Goetz Troost, Derek B. Booth, Scott A. Shimel, and Michael A. O'Neal Department of Earth and Space Sciences, University of Washington Project Elements People Regional Geology ... Liquefaction Landslides Mudflows Contamination Geologic Maps Critical Areas ... Resources Landslides throughout Seattle, such as those along Perkins Lane (above), have caused severe damage to residential property following heavy rainfall. The contact between permeable outwash sand and relatively impermeable glaciolacustrine silt and clay, exposed on most Seattle hillsides, creates a high risk area for landslides. Where recognized on a geologic map, this hazard zone can be avoided or engineered. Send mail to Webmaster with questions or comments about this web site. Last modified: 3/23/01
Introduction
PHIVOLCS. Foreword. The July 16 1990 Luzon Earthquake Rupture. Inventory andCharacterization of landslides induced by the 16 July 1990 Luzon Earthquake.
http://www.phivolcs.dost.gov.ph/soepd2/earthquakes/luzon1990/pp033/pp033.html

Extractions: Foreword The July 16 1990 Luzon Earthquake Rupture Inventory and Characterization of Landslides induced by the 16 July 1990 Luzon Earthquake Mapping of Areas Affected by Liquefaction during the 16 July 1990 Earthquake ... Some Implications of the July 16, 1990 Earthquake on Urban and Regional Planning in the Philippines Inventory and Characterization of Landslides Induced by the 16 July 1990 Luzon, Philippine Earthquake Philippine Institute of Volcanology and Seismology INTRODUCTION The 16 July 1990 Luzon earthquake triggered and induced numerous landslides in northern and central Luzon, Philippines. Abundant landslides occurred northwest and west of the ground rupture along Digdig Fault and on a narrow zone closely following the rupture along the Philippine Fault Zone (Fig.1). Landslides were observed as far as Lagayan, Abra in the north; Agoo, La Union in the west and Dingalan, Aurora in the southeast. The landslide-affected region is part of the Luzon Central Cordillera Volcanic Belt and marks the junction of the southern end of the N-S trending Luzon Cordillera Mountain Range and the Caraballo Mountains. The uplifted mid tertiary volcano-tectonic complexes of the Luzon Cordillera Mountains join with the Pliocene-Pleistocene volcanic centers of the Caraballo Mountains to form a very rugged topography. General Characteristics Send comments or suggestions to Webmaster
Virtual Reality Panoramas Of Landslides
Virtual reality panoramas of landslides and other types of mass wasting. VirtualReality Panoramas of landslides and Other Forms of Mass Wasting.
http://virtualguidebooks.com/ThematicLists/Landslides.html

Extractions: Virtual Reality Panoramas of Landslides and Other Forms of Mass Wasting Alaska This birch forest masks the destruction of the earthquake-triggered Turnagain Slide , Anchorage, Alaska. Rocky Mountain States On the debris of the Hebgen Slide , final resting place of 19 people, southwest Montana. The Gros Ventre Slide , in the Gros Ventre Mountains, Wyoming. Northern California Massive landslides in serpentine rock on the South Fork of the Smith River, near Gasquet, California. The huge Hardy Creek Slide on Highway One north of Rockport, California. A huge landslide along the South Fork of the Eel River, near Smithe Redwoods, California.
Effects Of El Niño On Streamflow, Lake Level, And Landslide
landslides and Debris Flows. Shallow landslides are generated during storms, becauseinfiltrating rainwater saturates the soil and raises porewater pressure.
http://geochange.er.usgs.gov/sw/changes/natural/elnino/
City Of Chula Vista - Fire Department - Landslides
landslides. The ground can move without a quake! Slowmoving landslides can causesignificant property damage, but they usually don't cause any deaths.
http://www.ci.chula-vista.ca.us/City_Services/Public_Safety/Fire_Department/Safe

Extractions: When most Californians think about ground movement, they probably envision images of the ground below them moving from side to side, or up and down, during an earthquake. After large-scale wildfires, areas left barren of grasses, plants, shrubs and trees are vulnerable to landslides through sliding, falling and flowing rock, mud, brush and trees, particularly during and after heavy rains. Therefore, it's important that residents of steep hillsides and canyons prepare for slides. Slow-moving landslides can cause significant property damage, but they usually don't cause any deaths. Mudslides, however, are much more dangerous. According to the California Department of Conservation, mudslides can easily exceed speeds of ten miles per hour and often flow at rates of more than 20 mph. Because mudslides travel much faster than landslides do, they can cause deaths, injuries and significant property damage. Use the following recommendations to help reduce the risk of death, injury and property loss from landslides, mudslides and other types of ground failure at home or work.
Jurassic Coast - Coastal Processes
Coastal Processes landslides Beaches Bays Headlands. landslides The Dorset andEast Devon coast contains a wide range of landslides, both large and small.
http://www.swgfl.org.uk/jurassic/coastal1.htm

Extractions: After periods of prolonged rainfall, the build up of water increases the weight of the cliff top. Increased poor pressure reduces the friction and allows large sections of the cliff top to break away. As the cliff top block subsides, it rotates along the slip plane within the cliff, resulting in the flat surface tipping back towards the cliff.
Beenleigh S.E.S. Unit - Landslide Action Guide - Queensland Australia
landslides Action Guide. landslides usually involve the movement of largeamounts of either earth, rock, sand or mud or any combination of these.
http://www.beenleighses.org.au/action_guides_landslide.htm
PhysicsWeb - Probe To Predict Landslides And Earthquakes
Probe to predict landslides and earthquakes 17 January 2002. Thediscovery of geological electrical signals that precede seismic
http://physicsweb.org/article/news/6/1/10

Extractions: 17 January 2002 et al Appl. Phys. Lett. Zimanowski and co-workers pressed together two pieces of volcanic rock and then slid one across the other. Electrodes in each rock monitored the electromotive force that built up between. Although the sliding force was constant, the researchers found that the electrical signal peaked periodically, shortly before any movement was detected. Based on this experiment, Zimanowski and colleagues developed a probe and used it to measure electrical signals at Mount Stromboli, an active volcano in Italy where landslides are frequent. The detector revealed a pattern in the signals similar to that in their experiment, and the team proposed a four-step process to explain it. Initially, the researchers believe, strain builds up between the layers of rock. 'Micro-cracks' then form at the rock surfaces as they creep over each other, exposing fresh rock. This causes electrical charge to accumulate, which generates the 'precursor signal'. Mechanical failure follows as the rocks slip past each other, and finally the interface relaxes and the electrical charge dissipates. According to the German team, this technique would be suitable for monitoring unstable mountainsides, in particular because it gives advance warning of landslides and volcanoes. 'The field probe is buried between 30 and 50 centimetres in the ground but its detection depth is presently one to two kilometres into the Earth's crust', Zimanowski told PhysicsWeb. Improvements to the probe could increase this to a depth of several kilometres, say the researchers, which could enable it to detect the precursor tremors of certain types of earthquake as well.
IDNDR Programme Forum 1999 Proceedings
WMO/UNESCO SUBFORUM ON SCIENCE AND TECHNOLOGY landslides. Speaker Dr.P. Canuti, Earth Science Department, University of Firenze, Italy.
http://www.unisdr.org/unisdr/forum/landwmo.htm

Extractions: Floods WMO/UNESCO SUB-FORUM ON SCIENCE AND TECHNOLOGY LANDSLIDES Speaker: Dr. P. Canuti, Earth Science Department, University of Firenze, Italy Landslides occur in all regions of the world when masses of rock, earth, mine waste or debris move down slopes and result from rainstorms, earthquakes, volcanic eruptions and various human activities. They usually strike without warning destroying landscapes, buildings and homes, breaking electrical, water, gas, and sewage lines and disrupting roads and railways. Landslides and disastrous mudflows during the 1997 and 1998 hurricane seasons in Central America and the Caribbean caused untold damage and the tragic loss of thousands of lives in vulnerable communities. Landslides in the United States alone are estimated to cause an annual loss of about $1.5 billion and at least 25 fatalities and many areas of the globe are even more vulnerable. For the future, achievement of a reduction in the tragic consequences of severe landslides and mudflows around the world requires continued emphasis on risk assessment and risk management, utilizing increasing scientific understanding of the factors which lead to landslides to develop and implement policies which will reduce exposure and vulnerability to these hazards.

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