81. 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

Discussion Mass Movements Mass Movements 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.

82. 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

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 COVER PAGE ABSTRACT INTRODUCTION MAPPING LANDSLIDES TRIGGERED BY THE EARTHQUAKE ... U.S. Geological Survey Last Modified Friday, 04-Jun-1999 12:20:01 EDT Website Maintained by: Tracy Roudebush USGS Accessibility Statement USGS Privacy Statement

83. 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

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.

84. 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

Disaster Services Disaster Safety Interactive Map Chemical ... Winter Storms Find Your Local Red Cross Enter Zip Code Here: Search Our Site Find Out Who Our Supporters Are Home Services ... Disaster Safety Mudslide Landslide and Debris Flow (Mudslide) (PDF File) Why Talk About Landslides? What Are Landslides and Debris Flows, and What Causes Them Awareness Information ... What to Do After a Landslide Why Talk About Landslides? 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. 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. Back to Top What Are Landslides and Debris Flows, and What Causes Them?

85. 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

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 Landslide information and links Recent articles in New Scientist Landslides 101 - USGS USGS Geologic Hazards Team - Landslides Landslide Links Landslide Recognition and Safety Guidelines (USGS) National Landslide overview maps of the United States ... Landslides in forested terrain Landslide case studies Thanks to Angela de Stefano for many of the links below. Alberta's Frank Slide Interpretive Centre - Home Page California: Major Landslide Damage Sites (related to recent heavy rainfall (Fall 97Present)El Niño) Potential San Francisco Bay Landslides During El Niño Earthquake reflects instability of Kilauea's south flank ... 8307 Environmental Geology home page This page is maintained by Roger Suthren Last Modified: Tuesday, 14-May-02 14:46:17 BST

86. 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

Streams, Landslides, Logging, Roads and Rain The heavy rains of early Feb 1996, washed more than just new logs into our streams. Here are some reports on what happpened. Silver Creek on the McKenzie Background for the following 3 reports from PCFFA Post-Storm Aerial Reconnaissance of the Middle Oregon Cascades and Middle Coast Range ... NEW STUDY: NORTHWEST LOGGING ROAD CONSTRUCTION OUTPACES STREETS, HIGHWAYS 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: Clayoquot Sound, BC Landslides Heavy Rain Causes Extensive Mudslides In Clearcut Areas in Idaho On the McKenzie River, the Browns Hole Section, there is an opportunity for a first descent of a side creek, Silver Creek. 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. THREE RECENT STUDIES LINK NORTHWEST FLOOD AND LANDSLIDE DAMAGE TO CLEARCUTTING AND LOGGING ROADS 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.

87. 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/

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

88. 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

BIBLIOGRAPHY OF CARIBBEAN LANDSLIDES Ahmad, R., 1986, Recent earth movements at Preston, St. Mary: ODPERIC News, Vol. 1, pp. 1, 4-5. Anderson, M. G., Kneale, P. E., 1985, Empirical approaches to the improvement of road cut slope design, with special emphasis on St. Lucia, West Indies: Singapore Journal of Tropical Geography, Vol. 6 , No. 2, pp. 91-101. Anonymous, 1938, West Indian landslide kills hundreds: Engineering News Record, Vol.121, p.685. Antonini, G., 1986, Processes and patterns of landslide change in Linea Norsete, Dominica Republic: New York: Columbia University, PhD Thesis. BDPA, 1983, Cartographie thematique d' Haiti: Paris: Fonds d' Aide et de Cooperation Francaise. Blume, Helmut., (Petzal, Cecily., ed.,) 1972, Peculiarities of cuesta landforms in Puerto Rico, VI th Caribbean Geological Conference, Venezuela, pp. 96- 99. Brabb, E. E., 1984, Landslide potential on St. Thomas, Virgin Islands: U.S. Geological Survey Open-File Report 84-762, pp. 97-102. Brown, D. , Romano, H., Rogers, C. T.,1985, Landslides and flood distribution in the West Coastal area- the role of geology, Proc.1st Trinidadian Geol. Conf. , Port of Spain, Trinidad .

89. 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

Enter Search Term: Landslides in Ohio Landslides in Ohio (GeoFacts No.8) "Those Dd Redbeds" Ohio Geology article) Send comments or questions to: glenn.larsen@dnr.state.oh.us Last update December 22, 1999

90. 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

contact us Dark Peak Fieldwork Introduction to landslides What they are How they are classified Why they happen: Slope Tectonic Activity Rock Type Rock structure Water People Themes Geology Vegetation Peat ... Next landslide page Landslides in the Dark Peak Home Background to the Peak District Virtual Tour ... Links Landslides - Introduction What are they? Landslides are the downslope movement of rock or debris or soil under the influence of gravity The process may also be called mass movement or mass wasting 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.

91. 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

Important Notices Avis importants Important Notices Avis importants

92. 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

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 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

93. 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

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 Ronaldo A. Arboleda and Ma. Theresa M. Regalado 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

94. 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

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.

95. 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/

96. 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

SEARCH CVFD Home Safety Information Brush/Wildfire Protection Heating Safety ... Electrical Safety Landslides The ground can move without a quake! 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.

97. 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

Coastal Processes Landslides Beaches Landslides The Dorset and East Devon coast contains a wide range of landslides, both large and small. The coast is unstable because there are numerous situations where porous strata, principally the Chalk and Upper Greensand, lie over impermeable clays. ANIMATION SEQUENCE Rain water soaks into the cliffs Black Ven between Lyme Regis and Charmouth. Upper Greensand lies over Lower Jurassic clays. The largest coastal mudflow inEurope took place here in the winter of 1958/9 After periods of prolonged rainfall, the cliff tops break away The sliding blocks send sand and mud tumbling through the undercliff and onto the beach The landslides reach a stable angle, leaving a stepped or terraced cliff...until the next time it rains How Landslides work Rain water sinks through the porous rocks but once it reaches the underlying clays it can sink no further. The water builds up along the junction between the rock layers and seeps out of the cliffs as a series of springs. 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.

98. 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

First Aid Action Guide Flood Action Guide ... Action Guide Landslide Action Guide Navigation Home Page Where is Beenleigh? E-mail Contacts Group Leader HQ / Shed Webmaster Beenleigh Group Group Leaders Address Membership / Feedback SES Hum ... In Memory Weather Metsat Imaging Lightning Tracker Rain Radar Activation's Local Activation's S.E.W.S. Action Guides First Aid Guides Floods Earthquakes Lightning ... Landslides General References Queensland SES What is the SES? Qld SES Portal SES Supporters Hijacker Graphics Sponsors Help Pages How to use this site? How do I join? Report dead links Suggestions to the webmaster Landslides Action Guide Landslides usually involve the movement of large amounts of either earth, rock, sand or mud or any combination of these. Landslides can be caused by earthquakes, volcanoes, soil saturation from rainfall or seepage or by human activity (eg. vegetation removal, construction on steep terrain). The rate of movement of a landslide can vary from exceptionally slow - centimetres per year, to a sudden and total collapse - such as an avalanche of perhaps millions of tonnes of debris.

99. 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

Advanced site search news January February March April May June July August September October November December Show summaries quick search Search the news archive. Previous News for January 2002 Next Probe to predict landslides and earthquakes 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.

100. IDNDR Programme Forum 1999                            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

IDNDR Programme Forum 1999 Proceedings "Partnership for a Safer World IDNDR Programme Forum 1999 for the 21st century ISDR Home page Home Proceedings Extratropical Storms Severe Local Storms and Tornadoes Drought ... Earthquakes Landslides Avalanches Tsunami Storm Surges Volcanoes ... 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.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 5     81-100 of 124    Back | 1  | 2  | 3  | 4  | 5  | 6  | 7  | Next 20