This video shows slip face dynamics on a sand dune in "Aeolian Landscapes" at the United Terminal at SFO. Sand slides of various sizes start at various points in the slip face, propagating sideways and upward. These slips are miniature versions of those on real sand dunes.

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This is a quick demonstration of using 3DVisualizer and ScreenFlow to view microbialites in 3D. The data consist of scanned images of a rock, created by my student Eric Stevens. They are uploaded into 3DVisualizer (see the YouTube channel spelunkerucd), which is a program written and released by http://keckcaves.org I used the commercial program ScreenFlow to capture my use of 3DVisualizer. There is no sound track.

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In this video, I discuss some of the basic ideas about using sediment grain composition to identify the source of the sediment. This is called provenance analysis. If physical weathering dominates, the resulting sediment has the same composition as the original rock types, so one can distinguish volcanic from metamorphic sediment sources for example. Chemical weathering alters the composition of the grains, so it can be more difficult to identify the sediment source. However, some grains are resistant to chemical weathering and can still be used.

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Weird Al's homage to The Doors, featuring Ray Manzarek himself on keyboards. Video directed by Liam Lynch.

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Whoa, yeah!

You've got a 65 Chevy Malibu
With automatic drive, a custom paint job too
I'll trade you for my old wheelbarrow
And a slightly-used sombrero
And I'll even throw in a stapler, if you insist

Craigslist
I'm on Craigslist, baby, come on
Yeah

Well, we shared a quick glance Saturday at the mall
I never took a chance, never approached you at all
You were a blonde half-Asian with a bad case of gas
I was wearin' red Speedos and a hockey mask
Come on, let's find that love connection that we missed

On Craigslist
Yeah, Craigslist, come on
I'm on Craigslist, baby
Maybe you are too
Bee bomp a chonk a donk bim bang boo

An open letter to the snotty barista
At the Coffee Bean on San Vicente Boulevard:
I know there were 20 people behind me in line
But I was on a cell phone call with my mother
Didn't you see me hold up my index finger?
That means I'll order my soy decaf hazelnut latte in just a couple minutes
So what's with the attitude, lady?
No tip for you

Got a trash can of Styrofoam peanuts, you can have em for free
You can drop by on the weekend and pick em up from me
But the trash can ain't part of the deal
Only givin' you the peanuts, get real
Don't have no Hefty bags, so bring your own
Don't bug me with questions on the phone
Don't ask for help, don't waste my time
And don't complain, cause they won't cost you a dime
Just ask yourself
Do you want my Styrofoam peanuts?
You can have my Styrofoam peanuts
Do you want my Styrofoam peanuts?
You can have 'em all

They're on Craigslist, yeah
Craigslist, oh baby, come on
I'm on Craigslist, Craigslist, Craigslist
I'm on Craigslist, Craigslist, Craigslist now
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On June 3, 2009, conditions provided a rare view of active lava churning within Kīlauea Volcanos summit vent located in Halemaumau Crater. This video (actual speed) shows the surface of the circulating lava, which is about 100 meters (300 feet) below the crater floor, or 180 meters (590 feet) below the camera. As lava gushes across the opening, its surface is disrupted by waves, splashes, bursting gas bubbles, and spatters of molten rock. It is not known how long these conditions will continue. The lava surface could soon crust over or drop to a lower level—or it could keep going, as shown here, for days, weeks, or months.

For safety reasons, Hawaii Volcanoes National Park has closed access to the summit vent, which has erupted explosively numerous times since it opened in March 2008. However, the public can see spectacular views the vent—especially the orange glow it emits after dark—from an overlook at Jaggar Museum or via HVO Webcams (http://hvo.wr.usgs.gov/cams/) .

Video was taken by Matt Patrick, USGS Hawaiian Volcano Observatory geologist, on June 3, 2009, around 7:00 p.m.

For more information, visit the HVO Web site at http://hvo.wr.usgs.gov/.

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Video shows direct observations of processes that move flocculated clay particles during the bedload migration of ripples that consist entirely of clay. Although the clay ripples share many features with sand ripples, they consist to 90% (by volume) of water, and are liable to be "invisible" once compacted and part of the rock record.

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Sedimentology Concepts #1
I briefly describe the principle of uniformitarianism, the principle of original horizontality, and the fact that younger beds overly older beds (surprise, surprise!). These concepts are key ideas for my course in Sedimentology and Stratigraphy. This video is my first and is intended as a study aid.

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Sedimentology Concepts #2
Walther's Law: The distribution of environments represented by rocks in a vertical stratigraphic column is related to the distribution of those environments laterally.

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In this video, I discuss the idea that older layers underlie younger layers. However, the age of individual grains can be significantly older than the age of the layer they were deposited in because the grains have to exist before they are deposited. In the special case of layers of volcanic ash, the ages of crystals in the ash might be only slightly older than the age of the layer they are in, which provides excellent opportunities for measuring the absolute ages of sediments.

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Sedimentology Concepts #9
Meandering rivers have distinctive migration patterns and deposit distinctive sediments, which I describe here.

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This video is a fast motion record of a sediment flume experiment illustrating braided channel processes similar to what may be found operating on an aluvial fan surface. The dimensions of the sediment flume are 6 meters long by 3 meters wide. Throughout the experiment, water and sediment were fed continuosly through the flume, while the floor of the flume was made to subside continuously effecting a continuous drop in base level similar to what might occur in a basin that is subsiding tectonically. The total amount of time elapsed for the experiment is 45 minutes.

Channel processes on display include channel avulsion (a change in flow direction brought on by a buildup or deposition of sediment), channel expansion (an increase of channel width brought on by a decrease in sediment supply or increase in water flow [aka a flood]), sweeping avulsion (a change in flow direction that occurs in a radial pattern), and bar growth (arcuate deposits of sediment that divide [mid-channel bars] or enclose [lateral bars] channel flow).

Number of occurences for each type of event:

avulsions, 5
channel expansions, 4
sweeping avulsions, 1
instances of bar growth, 2

Video and experiment by Chris Paola of the St. Anthony Falls Laboratory, University of Minnesota. Date of experiment unknown. Video downloaded from the webpage of Dr. Paul Heller (http://faculty.gg.uwyo.edu/he ller/), Department of Geology and Geophysics, University of Wyoming, USA. Video uploaded to YouTube with the permission of Dr. Heller.

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In the fall of 2003, a number of wildfires raged across the mountains and hills of southern California. Two of these fires - named Old and Grand Prix - occurred in areas adjacent to Cajon Pass, the locus of major transportation, power, and communications infrastructure. When winter rains fall on steep southern California land that has burned, water runoff is greater than on land that has not burned. The possibility of debris flow events also increases.

During a 24 hour period 24 to 25 December 2003, more than 4 inches (100 mm) of rain fell on the small rural town Devore and the surrounding mountains. Devore is located at the foot of Cajon Pass below the areas that burned in 2003. This footage was recorded in Devore, California on 25 December 2003 during and after the debris flow event produced by the torrential rains.

Three deaths occurred as a result of the Christmas Day debris flow events in the area around Devore. It is unknown whether any of the deaths occurred as a result of the debris flows depicted in this video.

This version contains video footage identical that found in the other debris flow event video posted to the YouTube GEOMORPHOLOGY channel. This one, however, has been posted without the onscreen explanatory text. No sound.

Video courtesy of Susan Cannon, researcher, Landslide Hazards Program, United States Geological Survey, Denver, Colorado.

Video recorded by Mr. Davis, resident, Devore, San Bernardino County, California, 25 December 2003.

TECHNICAL:

Camera make & model unknown | edited using Windows Movie Maker (more)

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Sedimentology Concepts #10

Wave and storms produce distinctive structures in sedimentary rocks, and I describe them here.

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An on-request version of an earlier video about coastal erosion on Earnse Bay. This video was made for the forthcoming Channel 5 News "Green Britain" week and is due to be broadcast at 11:30am (repeated at 7:00pm) on Monday 8th Jan 2006.

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Sedimentology Concepts #11

Tides produce distinctive sedimentary structures due to systematic changes in flow direction and speed. I describe the basics here.

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