Click here for the Old Blog...
All Tags
mars odyssey, 2011, a&w, ab, adventure, air mattress, airlock, alaska highway, alaska, alberta, amazing, ammo cans, amtrak, anchorage, apartment, april, arc, arctic circle, article, articles, awesome, baja, barter, bath, batteries, bc, beach, bear, bears, belize, black holes, blog, bolt, border, break down, bridal conference, british columbia, british, bugs, building, bus, business, ca, california, camelbak, camera, camp, campfire, camping, canada, canadian tire, canon, cargo, carhartt, carlin, carmacks, catchup, cement, cemetery, central america, chain, charging, charity, chicken, christmas, church, circuits, civilization, clause, clean, cleaning, clients, coffee, cold, colorado, columbia, computers, concentration camp, concrete, contact creek lodge, contour, cool, cooler, corozal, cot, crash damage, crater, culture, customs, darpa, dawson city, dealer, december, delta junction, delta, dempster highway, desert storm, destruction bay, dextre, digging, digital, dirty, discovery, dogs, domain, donkey, doohickey, dreams, drill, dunes, eagle plains, earl nightingale, ebay, edmonton, electrical wiring, engaged, esa, eva, fairbanks, fall, farm, feel different, ferry, fire, flywheel, food, fort nelson, fort st john, frame, freeway, fuel tank, galaxy, gas, gate, gdl, generator, glacier, glennallen, goal, goals, godaddy, good things, gps, gravel, green acres, greendragon, groucho marx, groups, h-46, highway, hike, holidays, hoover dam, hostgator, hotel, hst, hubble, hudsons hope, hunting, ice cap, id, idaho, impact, insurance, internet, inuvik, irvine, island, iss, jasper park lodge, jasper, jew, job, jobs, joe vitale, jpl, junction, kawasaki, kch, kelowna, kitchen, klr-650, la paz, lab, laptops, las vegas, led, lens, license, lincoln, loading, logistics, los angeles, mars, martina mcbride, mayan, mazatlan, metal, mexico, mig welder, mig, military, miller, mining, momentum, moose creek, moose, motivation, motorcycle, motorhome, mountains, movie, moving, mud, mule muffins, nasa, nature, nazi, nevada, north pole, north, northwest territories, notes, november, nv, nwt, of, off grid, okanagan, online, open source, or, oregon, over, packing, panic, panniers, park, parts, peace, penguin, peoria, perling, photo, physics, picture, pictures, plan b, plan, plates, polar, pole, poop, porsche, preparation, prices, prince george, psav, purline, purling, purloyne, quest, quote, quotes, rain, recycle, red woods, relatives, remorse, repacking, resilience, restarts, revisions, rich schefren, river, rocks, roof, roofing, roofs, rv, rycroft, ryley, san diego, san francisco, san pedro, santa, scenery, scorpions, seattle, sewing machine, sherpas, shopping, shower, shuttle, singer, slave lake, sleeping bag, slime, smoke, smokey, snakes, snow plows, snow, social media, solar, souvenier, spacewalk, spark plugs, spiders, sprockets, stars, steel roofing truss, sts-133, stuff, sub frame mod, success, sun, super, surplus, tacoma, taxi, teslin, testing, the, tijuana, tip, tips, tire, tires, toad river, tok, tools, top of the world, top, tours, train, travel, trees, tubes, twisty, updates, usa, usmc, vacation, valentines, vehicle, velcro, video, visiting, volunteers, wa, wac bennett dam, wal-mart, walking, wanham, warm, washington dc, washington, weapons, web, website, weight, welding, westbank, western truck body, whitehorse, wifi, wikipedia, wind, wood, word at work, work, working, world, wow, yamaha, yim saan, youtube, yt, yukon, zippers,
Subscribe in a reader
Twitter Feed
Blue on Mars
Blue on Mars
This image shows part of the floor of Rabe Crater, a large impact crater in Mars' southern highlands.
Dark dunes--accumulations of wind blown sand--cover part of crater's floor, and contrast with the surrounding bright-colored outcrops. The extreme close-up view reveals a thumbprint-like texture of smaller ridges and troughs covering the surfaces of the larger dunes. These smaller ripples are also formed and shaped by blowing wind in the thin atmosphere of Mars.
One puzzling question is why the dunes are dark compared with the relative bright layered material contained within the crater. The probable answer is that the source of the dark sand is not local to this crater; rather, this topographic depression has acted as a sand trap.
This image was originally released Oct. 24, 2007.
Image Credit: NASA/JPL-Caltech/University of Arizona