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Home clings to collapsing cliff in N. Texas

Home clings to collapsing cliff in N. Texas | Teachers Toolbox | Scoop.it

"The edge of the 4,000 square foot residence on Overlook Court was dangling about 75 feet above the rocky shoreline of Lake Whitney after part it it had already broken off."


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Lorraine Chaffer's curator insight, June 13, 2014 10:00 PM

Natural hazards

YEC Geo's curator insight, June 14, 2014 1:10 PM

In the lower map, the location of the house is marked by a yellow pushpin inside the solid red square.  Some geological background--this poor house has the misfortune to apparently lie directly upon the contact between two carbonate formations (marked by the white dotted line), and to also be on the erosive edge of a bend in the river. Both factors probably contributed to the demise of this particular home, which was eventually set on fire: https://tinyurl.com/nw7mfd2

 

 

One thing to notice is how straight the cliff edge is upon which the house is built.  Knowing that, I'd have to say that if I had a house located on the straight cliff edges within the dotted red squares I've made on the map, I'd be worried.

 

You can read about the geology of Texas here:

https://tinyurl.com/lrcp9yj

 

Image credit here: http://www.nbcdfw.com/news/local/House-on-Lake-Whitney-Cliff-Falling-Into-Lake-262718721.html?partner=nbcnews

Massimo Di Duca's curator insight, June 15, 2014 12:13 PM

E la prospezione geologica da presentare al Comune? Era prevista nel PRG del comune? Esisteva un VIA?

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Largest glacier calving ever filmed

"On May 28, 2008, Adam LeWinter and Director Jeff Orlowski filmed a historic breakup at the Ilulissat Glacier in Western Greenland. The calving event lasted for 75 minutes and the glacier retreated a full mile across a calving face three miles wide. The height of the ice is about 3,000 feet, 300-400 feet above water and the rest below water."

 

Tags: physical, geomorphology, landforms, erosion, climate change, Greenland.


Via Seth Dixon
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More information at www.chasingice.com

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Flaviu Fesnic's comment, April 12, 2014 3:31 PM
impressive !
Maricarmen Husson's curator insight, April 13, 2014 2:15 PM

Adam LeWinter and Director Jeff Orlowski filmed a historic breakup at the Ilulissat Glacier in Western Greenland

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Video: The Science of Mudslides

They begin in an instant, often without warning. Many factors can contribute to mudslides, including erosion, fire and heavy rain. The aftermath can be devastating.
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Sinkholes and Karst Topography

The above YouTube clip was embedded in this LiveScience article: "Sinkholes are an increasingly deadly risk in Florida, due primarily to the region's geology. The state is largely underlain by porous limestone, which can hold immense amounts of water in underground aquifers. As groundwater slowly flows through the limestone, it forms a landscape called karst, known for features like caves, springs and sinkholes.

The water in aquifers also exerts pressure on the limestone and helps to stabilize the overlying surface layer, usually clay, silt and sand in Florida. Sinkholes form when that layer of surface material caves in.

The collapse can be triggered by a heavy overload, often caused by a downpour or flooding, or when water gets pumped out of the ground."


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Bonnie Bracey Sutton's curator insight, January 30, 2014 11:03 PM
What a great piece. Mind your p's and q's and Karst.
Shiva Prakash's curator insight, February 3, 2014 11:20 PM

Technology is changing the shopping habits of buyers. Compete recently conducted a survey that reported a rapid increase in the number of people using their mobile devices for shopping Online shopping which u can buy from home easily with lots of designs of cloths and new technology mobile phones without going out for shopping just click here to go eaZy http://shopdeer.blogspot.in/

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Block-Long Sinkhole Swallows Cars in Baltimore

Block-Long Sinkhole Swallows Cars in Baltimore | Teachers Toolbox | Scoop.it

"A block-long sinkhole opened up in a residential neighborhood in rain-soaked Baltimore on Wednesday, devouring cars and forcing the evacuation of several houses."


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Seth Dixon's curator insight, May 1, 2014 4:35 PM

We like to think that the Earth beneath our feet is solid and that the configuration of the landforms in our neighborhood will be unchanging.  This a dramatic reminder that Earth's physical processes don't ever stop--even if we've built a city in that spot.  Watch this retaining wall collapse in this video.


Tags: physical, geomorphology, erosion, landformsweather and climateurban ecology.

Jim Doyle's curator insight, May 9, 2014 10:57 PM
Block-Long Sinkhole Swallows Cars in Baltimore
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Logging and Mudslides

Logging and Mudslides | Teachers Toolbox | Scoop.it
In recent decades the state allowed logging — with restrictions — on the plateau above the Snohomish County hillside that collapsed in last weekend’s deadly mudslide.

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Geofreak's curator insight, April 3, 2014 1:39 PM

Mijnbouw en aardverschuivingen, een goede combinatie ...... 

PIRatE Lab's curator insight, April 7, 2014 11:48 AM

There are several reasons for mudslides--some are purely a result of physical geography and others are related to land use patterns.  This last week's mudslide in Washington state was a combination of the two and although this impacts one place (see on map), it is a good teaching moment to discuss the environmental impacts of land use patterns and resource extraction projects.  As seen in this interactive, the river was cutting at the base of the hill, while loggers were clear-cutting at the top of the mountain.  Trees help prevent erosion as the roots hold the soil in place--a critical piece to the puzzle in a very rainy climate.  With $1 million worth of timber on the slope, logging companies persisted despite objections from the Department of Natural Resources and some restrictions (but in hindsight, those restrictions clearly were not enough). 

 

View the impact in ArcGIS online: Before and After Swipe, LiDAR I and II, and Imagery.

 

Questions to Consider: Other than economic worth, what other ways are there to value and evaluate the environment?  How could this landscape have been protected and managed better or was this mudslide inevitable?   

El Futuro deWaukesha's curator insight, April 18, 2014 12:03 AM

Working on an Inquiry of recent natural disasters with first grader.  

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Rivers from Above

Rivers from Above | Teachers Toolbox | Scoop.it
Get a unique view of these rivers beyond the banks.Photo editing by Lia Pepe

Via Seth Dixon
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Woodstock School's curator insight, February 25, 2014 5:01 AM

The Art of Geography

Mark Burgess's curator insight, February 26, 2014 6:26 AM

Awesome rivers. i love a good river.

ok's curator insight, September 23, 2014 5:45 AM

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