Friday, 27 April 2012

Geo-vandalism in Bartlett Wash, Utah

Dr. Bruce Trudgill (assistant professor at Colorado School of Mines) has reported in the Geotectonics email list an act of geo-vandalism in the Bartlett Wash outcrop, in southeast Utah (USA).

Quoting Bruce,

Many of you may have visited this spectacular location on university or industry field trips, or for your own research purposes. The location of the exposure is on a splay off the main Moab Fault, and it illustrates many aspects of brittle deformation and fluid flow, as well as some un-paralled exposures of aeolian dune sets in the Slickrock member of the Entrada Formation. It's a truly world-class field location and has been used in a number of publications and texts, including the following figure in Haakon Fossen's structural geology textbook.
Figure 8.11 in Structural Geology by Haakon Fossen (Cambridge University Press)

One of the key aspects of this location is the 100% exposure of deformation bands in the footwall of the fault and their relationship to fluid flow. Students can measure and plot deformation band density in the footwall of the fault and it's a great location to discuss their influence of fluid migration. Anyway, this (formally) pristine outcrop is now missing a few of the deformation bands in Haakon's photo due to some mindless geo-vandalism (see below)

Photo taken by Roy Luck on September 29th 2011.......note the rock powder spread around the outcrop showing evidence of very recent cutting
[end of quotation]

The exact coordinates of the affected area are 38° 43' 00.09" N  109° 47' 17.85" W:

View Larger Map

This act of vandalism took place between 25th and 29th of September 2011. The following picture portraits Bruce on the 25th, early evening:
Bruce Trudgill in the intact outrop. Red circle shows the area later on vandalised by unknown people.

If you know who has done that, you should contact Bruce ( or Becky Doolittle (rdoolitt at blm (d.o.t.) gov) at the Bureau of Land Management. Vandalism is an act of crime.

Why people do that? Reasons (excuses?) are not short. Some people do it for an economic interest: Nice primary or secondary structures, fossils, minerals, etc,  are aesthetically attractive, and they can be sold for good money. Researchers need to take samples. But things can be done right, or wrong. Cutting off a cube of rock with an electric saw in an outstanding outcrop, in such a visible place, is plainly wrong.

If the responsible guys of this act of vandalism are researchers, sooner or later others will know. They will be the ones who spoilt Bartlett Wash. For future researchers, think twice what you do on the field, and think how would you like to find an outcrop if you would be the next person to arrive. You are scientist, full stop. Preservation of nature has to be your main objective, always. 

Thanks Bruce for raising the voice about this sad issue. Many of us have never been there, or even near, but that doesn't mean we don't feel something has to be done. Thanks also for the pictures and the permission for the quotations!

Thursday, 26 April 2012

Thursday video: The Magic Toilet Paper

Thursday video will be a fixed section in this blog where we will link toYouTube clips (or other sites, of course!) related with tectonics and structural geology. If you want some video displayed here, please feel free to let me know and I will do it.

Let's start with this video from the Structural geology, Tectonics and Geomechanics Research Group of the University of Aachen (Germany). It shows a toilet paper roll being compressed, and behaving like a multilayer. It develops some chevron folds and kink bands, and what it is very interesting, you can do that at home with some DIY skills...

Ladies and gentlemen... "The Magic Toilet Paper"!

You can subscribe to their YouTube channel, or follow them in Twitter. Anyway, you can be sure they will be regularly featured here, as they have been doing for some time very nice and cool stuff.

Thursday, 19 April 2012

USGS make available topographic maps online

USGS has just announced that their historic collection of topographic US maps goes digital. More than 161,000 maps have been digitased and made available online here:

If you are a student in the US, that should be good news for you, as you won't have to spend a dollar in maps for working in your own doing geological mapping. Which you should do, as practise makes perfection! ;-)