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of the central andes east of and just over the continental divide from santiago chile part of the program was a day trip up to the andes to look at the fold thrust belt structure this is very close to aconcagua which is the highest peak in the western hemisphere almost 7 000 meters i snapped this photo on the last stop of the day near the divide border of a landslide that occured about 100 years ago apparently the timing of this is known from notes and observations from european explorers settlers note the building in the lower right foreground for scale posted by brianr at 4 27 2007 3 comments labels earth hazards friday field foto photographs i ve taken thursday april 26 2007 structural deformation revealed on sea floor image as you ve seen from previous posts on this blog e g here here and here i have a penchant for images of sea floor bathymetry not only are they fascinating and aesthetically pleasing but they constantly remind of us of how much we don t know about our own planet surface remember 2 3 of the earth s surface is under water we have mapped the surface of mars better than earth a recent deep sea news post reminded me of a great web resource if you are interested in marine science it is called simon which stands for sanctuary integrated monitoring network is a portal for all things related to the monterey bay national marine sanctuary much of the site involves the biological and habitat aspects it is a sanctuary after all but there is also great stuff regarding the geology and geomorphology of the area the image below see page on simon here for all the details is from an area offshore of the central california near half moon bay just south of san francisco and north of santa cruz this area is called mavericks and is a popular surfing spot what is most striking is how nicely the structural deformation of pliocene sedimentary rocks is shown with this image movement on the san gregorio fault a wholly owned subsidiary of the san andreas has produced this folding and the layered nature of the strata has resulted in the differential erosion and alternating ridges and valleys seen on the bathymetry posted by brianr at 4 26 2007 1 comments labels geology marine science photos images sea floor image sf bay area wednesday april 25 2007 where on google earth 9 beautiful good luck posted by brianr at 4 25 2007 6 comments labels where on google earth fossil forest check out this article from bbc com about some spectacularly preserved plant fossils discovered in an underground coal mine in illinois the fossil forest was rooted on top of the coal seam so where the coal had been mined away the fossilized forest was visible in the ceiling of the mine we walked for miles and miles along pitch black passages with the fossil forest just above our heads we were able to make a map of the forest by the light of our miners lamps said dr falcon lang from the university of bristol look for the paper in the journal geology posted by brianr at 4 25 2007 0 comments labels geology sunday april 22 2007 review of thin ice by mark bowen please note as of august 2007 his blog has moved you can find this same post at the new blog here thanks a couple months ago thermochronic over at apparent dip started a list of popular science books and will be reviewing them as he reads re reads them here s the first he asked fellow geobloggers to suggest books for this effort i recently finished thin ice by mark bowen i m going to provide a short review here hopefully not stealing thermochronic s thunder the subtitle of this book unlocking the secrets of climate in the world s highest mountains succinctly sums up what this book is about bowen successfully weaves together adventure and science for any of you out there who have done a lot of field work you will like it there are many anecdotes about working and surviving in the field ranging from humorous to tragic i tend to like stories about adventurers who are also scientists rather than people going through hardships just to do it lonnie thompson a climate scientist at ohio state university and an assortment of others from his research team are the main characters in this story for decades lonnie and his team have been drilling and studying cores from high alpine ice sheets including peru quelccaya bolivia sajama tanzania kiliminjaro and qinghai tibetan plateau dunde an interesting aspect of this story is how in the 1970s and 80s the paleoclimate community more or less regarded alpine cores especially from low latitudes as useless to climate reconstruction everyone believed all the answers were in the big continental ice caps near the poles greenland and antarctica the results from thompson s work showed that these ice caps have records going back maybe not has far as the continental ice sheets but much farther than had been postulated 100 000 years furthermore the climatic fluctuations that are recorded in these lower latitude archives have important implications for weather patterns that the polar records just cannot address bowen also includes great sections on the history of climate and paleoclimate science interspersed with the narrative of the ice coring work of thompson s team i found this book to be at a great level for a scientist who s not a paleoclimate expert or a layperson who is motivated that is you need some background to stay engaged but you don t need to be an expert in atmospheric dynamics posted by brianr at 4 22 2007 0 comments labels books global warming misc science saturday april 21 2007 underground musicians literally in this case this is a video of flute player greg pattillo and cello player eric stephenson at union square subway in nyc via hidden track and on youtube where you can find other videos of pattillo it s a couple minutes long give it a listen posted by brianr at 4 21 2007 0 comments labels music video friday april 20 2007 friday field foto 13 permian rocks of the delaware mts this is from west texas my old master s degree stompin grounds the permian brushy canyon formation is the sandstone and siltstone making up the foreground cliffs in the background along the skyline is the guadalupe mountains which is the highest point in texas the geology of this area is very unique in that these mountains expose a shelf shelf margin and basin transition across 100 km nearly continuously one of these days i ll post some more info about that this photo taken by and courtesy of my friend marieke posted by brianr at 4 20 2007 3 comments labels friday field foto photos images turbidites thursday april 19 2007 balloons in an office the randomness tag couldn t be more appropriate for this post our research group is wondering how to celebrate our advisor s birthday this year which usually ends up being a tribute and or roast in the past students have also done things to his office so there s a surprise waiting for him in the morning anyways while researching this i came across this video on youtube that absolutely made my day posted by brianr at 4 19 2007 2 comments labels humor randomness video wednesday april 18 2007 sea floor laboratory offshore british columbia washintgton and oregon yes more sea floor laboratories i posted just last week about a somewhat similar plan for monterey submarine canyon this one is in the northeastern pacific ocean offshore of bc washington and oregon here are the highlights from this article in sciencedaily neptune north east pacific time series undersea networked experiments is a joint u s canada venture led by the university of victoria in canada and the university of washington in the united states located in the northeast pacific on the active juan de fuca tectonic plate neptune will allow scientists to monitor biological oceanographic and geological processes over a period that could stretch to more than two decades six unmanned sea floor nodes each roughly the size of a sport utility vehicle and each hosting an array of instruments equipment and video cameras will be installed on the ocean floor in canadian waters the first stage of neptune is scheduled to start in summer 2008 let s hope their equipment doesn t get destroyed by a turbidity current on the other hand we could use the data posted by brianr at 4 18 2007 0 comments labels marine science monday april 16 2007 where on google earth 8 i m not gonna give any clues not until there s at least a few guesses posted by brianr at 4 16 2007 10 comments labels where on google earth saturday april 14 2007 video of landslide in japan update as of aug 07 this video was removed from youtube sorry i finally took 5 minutes and figured out how to embed youtube videos on this blog from time to time i m gonna post geo related footage this one is of a landslide that occurred in japan posted by brianr at 4 14 2007 0 comments labels earth hazards video back to regular life i m nearly done with this latest stint on the shrimp i need to blast about 5 more zircons what a way to spend a friday night i was gonna work on finishing up a paper that needs to get off my desk my upcoming spring review progress report reading a bunch of papers that i ve been meaning to get to and various other research related activities while running this machine the last 3 days instead i played around on the internet surfing the web is such a spasmodic and nonlinear activity it actually goes perfect with running this machine which has a sequence of mindless tasks every 7 minutes i ve been checking out some music related sites blogs i started a list on the sidebar i haven t posted too much about live music on this blog because i just haven t seen much lately the whole finishing up the dang phd thing has gotten in the way i m hoping to change that this summer okay 4 zircons to go posted by brianr at 4 14 2007 2 comments labels randomness friday april 13 2007 friday field foto 12 combined flow ripples i realized today that i haven t done a friday field foto since early february go here to see all the previous fff posts today i decided to show a close up instead of the usual landscape scale views that i usually post this is from the cretaceous of central utah associated w these rocks and shows some very nice ripple cross laminated sandstone in this case you can very nicely see some slightly climbing ripple laminated sandstone toward the bottom overlain by some ripples heading the other way apparently and then some wavy laminae and smaller scale ripples on top above and below this bed are abundant hummocky cross stratified sandstones indicating that these ripple laminated deposits are likely the product of combined flow oscillatory unidirectional associated with storm waves i e between storm and fair weather wave base posted by brianr at 4 13 2007 0 comments labels friday field foto photographs i ve taken sedimentary structures utah thursday april 12 2007 inverted depositional features on mars fyi this post is not about brand new discoveries you can find information about these features on mars global surveyor website and also check out a science paper from 2003 by malin et al that goes over this stuff in more detail i just felt like posting about it i was living in colorado some years back when i went on a trip to look at the local geology of the front range and had one of those great field moments when the trip leader pointed out some inverted topography in this case a relatively small volcanic eruption produced lava flows that were isolated in a mountain valley since that time the surrounding much softer sediments and sedimentary rocks have eroded away leaving lava capped mesas that are now segmented by the modern river the image below is of golden showing the modern clear creek cutting the lava capped mesa in two yes that complex of structures right in the valley is coors brewery image courtesey of www tablemountains org these modern positive topographic features are representing an ancient valley very cool so while wasting time on the internet in 7 minute increments i came across some old bookmarks about some inverted topographic features on mars the group of features discovered in november 2003 by mars global surveyor mgs have been dubbed the eberswalde delta the image above is fig 2 straight from malin et al 2003 showing the exhumed fluvial distributary fan click on all images for larger view the conspicuous curvilinear features at closer examination are actually positive topography inset of box a below clearly shows the deposits of a migrating meandering stream standing as a plateau above the surrounding area this is a striking example of inverted topography in this case the channel deposits contain coarser material likely sand gravel and therefore are more resistant than the out of channel material likely mud silt no data from the planet surface exists for this location but these are reasonable guesses the cross cutting relationships of this feature also nicely reveal that the wide meander swing was abandonded for a shorter more direct route at some point the image below inset box b shows more cross cutting ridges representing channel fill deposits i would sure like to walk up the edges of those ridges and plateaus to check out the cross section of that fill another thing to notice is the apparent spreading out of coarser grained material from left to right malin et al interpret this as the lobe deposits at the end of these channel features which seems pretty reasonable to me the implications of all this of course are further evidence of flowing water on mars the big problem we are faced with at this point is not so much if water flowed on mars but when the next generation of rovers are gonna half to brush up on their geochronology posted by brianr at 4 12 2007 0 comments labels geology photos images planetary science wednesday april 11 2007 data sonification although it would likely be a waste of time i have always been tempted to somehow turn geologic data i have collected into sound it is commonplace to convert data into visual representations by which qualitative patterns are evaluated by simply looking at it e g maps less common is converting data into sound and listening for patterns the idea of turning data into sound for analysis is certainly not new e g the geiger counter was invented in the first decade of the 20th century but the application of sonification to varied data types across scientific disciplines has seen more activity in the last couple of decades it is important to make the distinction between music and sound a separate but related discussion would deal with the potential for creating new kinds of avant garde music within this realm check out here 1 and here 2 but that s not what i m talking about data sonification is simply the auditory equivalent of data visualization yes some visual data is certainly striking in its beauty but aesthetic value and scientific value are mutually exclusive in recent years data sonification has been applied especially in biomedical disciplines e g here and here but...
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