A comparative study of endolithic microborings in basaltic lavas from a transitional subglacial – marine environment

first_imgSubglacially erupted Neogene basaltic hyaloclastites in lava-fed deltas in Antarctica werefound to contain putative endolithic microborings preserved in fresh glass along hydrous alterationboundaries. The location and existence over the past 6 Ma of these lava deltas has exposed them tosuccessive interglacials and subsequent percolation of the hyaloclastite with marine water. A statisticalstudy of the hyaloclastites has found that endolithic microborings are distinctly more abundant withinsamples that show evidence for marine alteration, compared with those that have remained in a strictlyfreshwater (glacial) environment. Additionally, correlation between elevation and the abundance ofmicroborings shows endolithic activity to be more prolific within lower elevation samples, where thehyaloclastites were influenced by marine fluids. Our study strongly suggests that endolithic microboringsform more readily in marine-influenced, rather than freshwater environments. Indeed, marine fluids maybe a necessary precondition for the microbial activity responsible. Thus, we suggest that the chemistryand origin of alteration fluids are controlling factors on the formation of endolithic microborings inbasaltic glass. The study also contributes to the understanding of how endolithic microborings could beused as a biosignature on Mars, where basaltic lavas and aqueous alteration are known to have existedin the past.last_img read more

The Disco Biscuits Share Full Video From Night Three Of Colorado Run

first_imgLoad remaining images The Disco Biscuits have been on a tear in Colorado, playing a great four-night run in the colorful state. The run started with three straight nights at the Ogden Theatre in Denver, CO, before the band returns to the prized Red Rocks Amphitheatre tonight to put Bisco Inferno to a finale.The band was in top shape last night, opening things up with a “House Dog Party Favor” and playing essentially a three song first set, sandwiching “Story Of The World” inside a “Caterpillar” jam. The second set was only five songs in total, opening with “King Of The World” and segueing seamless between “Mindless Dribble,” “Shem Rah Boo,” “Down to the Bottom,” and “Sound 1.” The band is on fire!Their encore brought even more fire, as they opened it up with Pink Floyd’s “Run Like Hell” and worked a “Tricycle” in the middle. What a show! Listen/watch the whole performance via this beautiful pro-shot video, streaming below.The Biscuits bring Bisco Inferno to a close tonight, June 4th, at Red Rocks! Check out last night’s setlist below.Setlist: The Disco Biscuits at The Ogden Theatre, Denver, CO – 6/3/16Set I: House Dog Party Favor, Caterpillar-> Story of the World (inverted)-> CaterpillarSet II: King of the World, Mindless Dribble-> Shem Rah Boo-> Down to the Bottom-> Sound 1Encore: Run Like Hell-> Tricycle-> Run Like HellCheck out a full gallery of images below, courtesy of Courtney Harrington Photography.last_img read more