Photobucket

CREATION ART

****
  • Photobucket Songs of Earth's Creations. In an endless cycle of eons she creates and destroys masterpieces, reusing her building materials to create anew. From death comes life.Photobucket
  • ****

    ..........................................

    Saturday, September 23, 2006

     

    SANDS OF TIME; Some dunes are estimated at 10,000 to 50,000 years old

    Gypsum dunes - White Sands National Monument - White Sands, New Mexico
    Volcanic ash dunes, Galapagos- Western EcudorGypsum dunes, White Sands National Monument, New Mexico

    Gypsum Pedestal - White Sands National Monument - White Sands, New Mexico
    Star Dunes - Namib......................
    Linear Dunes _ western desert of Egypt
    Crescentic Dunes atop a Dome Dune - Saudi Arabia
    Crescentic Dune - Egypt..........
    Ripples on Dunes - Eureka Valley - California
    Linear Dunes - playas east of Lake Eyre in Simpson Desert of central Australia
    Crescentic Dunes - Coastal Peru...

    [.................At present the wonders of sand will be presented via text only. Later, I will download photos of sandy beaches, desert sands, etc............................................................]


    SANDS OF TIME

    "Sand," Rachel Carson tells us, "is a substance that is beautiful, mysterious, and infinitely variable, each grain on a beach is the result of processes that go back into the shadowy beginnings of life, or the earth itself." There is nothing particularly striking about a grain of sand, unless, of course, you have the misfortune of having one blow into your eye. Then the speck that seems so benign and innocuous reveals its true character as a descendant of the great rocks of the world.

    But to sedimentologists, geologists, and paleogeographers, the size, shape, roundness, surface texture, and composition of a single grain of sand tell the story of forces that pried it from its matrix and brought it to the shore. If one sifts through a handful of sand, and looks closely at the grains, it is possible to detect many individual shapes, sizes, and colors; these variations are even more dramatic if samples come from different beaches. Some grains are almost perfectly round and smooth, others jagged, rough, and irregular in texture and shape. Light-colored, nearly spherical sand is composed almost entirely of quartz, a common mineral from which the earth's crust is compounded. In contrast, dark sands are made up of volcanic particles and complex silicates that were spewed up from deep within the earth's core.

    Nearly indestructible, a single grain of sand can be millions of years old. These fragments can be seen as the original "silicon chip," acid-etched with the story of the rise and fall of mountains, rivers, deserts, and creatures. Lilliputian messengers from the depths of geologic time, grains of sand are the bridge between past and present--the last, hardy survivors of distant islands, deltas, cliffs, mountains, and long-lost landforms. Buffeted by wind, leached by rain, bleached bone-dry by the sun, sands are also made up of the carbonate skeletons of creatures from the tepid tropical seas, and in this respect are geological cartes de visite from obscure worlds beneath the waves.

    Generally ranging in size from one sixteenth of a millimeter to two millimeters--and sometimes even five millimeters--in diameter, sand is smaller than gravel but larger than silt or clay. The rich tonal variations and range of shapes emerge fully only under a microscope, where sands reveal themselves as pointed and bulbous rays exploding from pillow-shaped centers; creamy lozenges; shiny ball bearings; jagged, striated, and pitted flakes; glossy disks and striped cigars; spheres as bumpy as Trix cereal; shriveled red chiles of volcanic lavas; and crystalline green jelly beans bursting with glauconite from the ocean floor.

    The mechanics of sand formation are simple. Rocks, reefs, and coral break down through either mechanical or chemical weathering, becoming smaller and smaller as they are pounded by the hydraulic or pneumatic pressure of waves. They are pried apart by ice exerting thousands of pounds of pressure per square inch, or split by the insistent probing and prying of plant roots. Heated by lightning or fire, rocks expand until they break off in chips and flakes. Or, through involved chemical processes, minerals and chemicals within the rocks-gradually decompose, and the rock literally decays as if it were an organic substance. The size of each resulting grain is determined by the kinetic intensity of the medium that transported and deposited it. A strong current or a powerful wind, for instance, tends to carry larger particles greater distances. The smoothness or the jaggedness depends on the degree of abrasion during transport. The rounder the sand, the longer it has been weathered by wind or water. By contrast, ragged grains have either not traveled far or been cushioned in their journey by an envelope of mud.

    The weathering process that turns rocks into sand, however, is only half the story. The other half involves the consolidation of sands into rock during the vast intervals of geological time. The rock of ages, as it turns out, is impervious to time only in our minds. Sand that once was rock becomes rock once again as it slowly sediments and compresses into layers of sandstone, which, in turn, transmute into sand. Standing on a cliff overlooking a raging sea, we watch waves hurl themselves against the shore, scooping up cobbles at the base of the cliff and lofting them into the crown of seething foam. Then the wave retreats, hauling its load of stone along the sea bottom, until the next swell rushes in to repeat, relentlessly, the work of breaking, grinding, polishing.

    In warm waters, abundant sea life provides a steady source of bone and shell fragments, from conches, clams, mussels, scallops, shellfish, corals, fish, and even microscopic plankton. Most of the fabled white beaches of the world are in fact the burial mounds of such sea life. Radiocarbon dating shows that the sand of Miami Beach, for example, is on average thirteen thousand years old, with some material over thirty thousand years old. So, as we dig our toes into the soft shell sands, we quite literally burrow deep into antiquity.

    Because sand is derived from a spectrum of substances, it comes in many colors--tan, yellow, white, pink, purple, red, blue, green, gray, and black. The precise shade of each grain depends on the rock or organism from which it came. To a great degree, color alone can identify the origin of a beach with reasonable accuracy. Armed with a strong hand-lens, an experienced geologist can readily distinguish between translucent, light-colored grains of quartz and brown, dullish feldspar, and then link these properties to the geological history of a specific beach type.

    Delivered to their site long ago by slowly moving glaciers, the whitish beach sands of the Northeastern United States are mainly mineral in origin. As one moves farther south--to North Carolina, let's say--the sand begins to take on the pinkish and pale-yellow hues of crushed seashells. Florida's eastern flank is rimmed with coarse grains of quartz, but the tip and the western shore are covered with sand the color and feel of uncooked semolina. Along the Gulf Coast, the fine-textured beaches blend the rosaceous tint of pulverized shrimp and conch with the white, yellow, and orange colors of minerals--copper, calcium, and quartz--carried there by rivers from the Appalachian highlands and the Great Plains.

    As one moves farther south and west, beach sands begin to broadcast a flashy, south-of-the-border exuberance characterized by the paintbox tints of tropical seas. The brilliant white of Bahamian beaches is derived from the precipitated oolites or calcium-carbonate coating on bits of coral and whelk. Bermuda's pink sands blush with the calcite of limestone, coral, and shell. The gray sands of St. Lucia's southwestern rim, on St. Kitts, Saba, and Domenica--all in the Caribbean--bespeak a volcanic origin. In fact, the mixture of vanilla-colored shell and coral beaches and dusky volcanic sands is a formula repeated throughout the tropics. This pangeological recipe is evident in the golden coral beaches of the Seychelles in the Indian Ocean, the mauve-and-purple sands of Fiji's Taveuni Island, and in Queensland's kaleidoscopic blends of ground-up shells from the Coral Sea. The striking hues of Hawaii's shores--the olivine green of Papa-kolea Beach, the cinder-cone red at Hoku-'ula, and the jet black of Polulu Beach--also derive from volcanic eruptions, rather than decomposing sea life.

    As one travels north into the temperate zone, the color palette of beach sand fades in vibrancy. On the eastern coast of England, the pockets of sand deposited among the shingle are, like the rock from which they have eroded, light gray. By contrast, the northern coast takes on an almost honeyed hue. Along the northeastern coast of Wales, the golden beaches have a faintly rosy cast. All along the Baltic, the dunes and berms are a soft tan. Mediterranean beaches--the Costas del Sol, Calida, Blanca, Dorada and Brava, as well as the strands on deltas of the rivers Rhone, Arno, Po, and Brenta--range from puce to whitish gray, reflecting the tints of clay, mud, and river sand transported from deep inland. Up and down the Cote d'Azur, along Italy's southern coast, and on the shores of Alexandria, the pale sand flashes an occasional grain of marble, glass, or alabaster that centuries ago was part of some ancient Roman villa. By and large, the meager sands of Mallorca, Sicily, Sardinia, Corsica, and Cyprus--and of other islands in the Adriatic and the Aegean--are coarse, lacking the sustained buffeting of rough winds and waters.

    Along the Sea of Cortes and on the Pacific coast of Baja California, the beaches still sparkle with coarse-grained sand colored the buff of desert rock, the white of marlin bones, and the burnt sienna of weathered coral. But along the beaches of the Pacific Northwest, tan and gray predominate. Descended from basalt cliffs that were extruded as sea-floor lavas several million years ago, these sands glisten like oil slicks when wet. The brownish specks scattered among them come from the quartz and feldspar of granites that were spot-welded to the Rocky Mountains of the North American continent, and then spilled down the tributaries of the Columbia River, before draining into the Pacific. Other mighty rivers--the Orinoco, the Amazon, and Argentina's Colorado--enrich ocean sands with grains of gold, platinum, and uranium, to which is added the glint of garnets and emeralds.

    In certain beaches, sand exhibits another remarkable property, neither useful nor threatening, but aesthetic. These sands "sing" and "bark," as though they were endowed with vocal cords, although in this instance the musical sounds are produced by the gentle friction of grain against grain. In Kauai, Hawaii, a golden knot of windblown dunes in the shadow of the opal-tinted cliffs of Polihale produce cries in various cadences. In the wind, they rustle like silk; when someone slides down them, they bark like dogs.

    Still intriguing scientists, singing sands have been threading through the literature of explorers and travelers for over a thousand years, posing the riddle of their vocalization. Some say the sound is produced by the friction of sand against sand that has been coated with dried salt, much as the violin's melody is produced by the action of resin on the bow. Others speculate that the thin layers of gas which are released between the grains act as percussive cushions capable of considerable vibration and tone production.

    Balefully sibilant "singing sands" have been discovered in England and Wales. On the Isle of Eigg, in the Hebrides, the snowy sand at the base of sandstone cliffs gives off an eerie whining. The sands of Oregon's Florence Beach squeak with the high-pitched bark of distant chihuahas. But perhaps the most fabled of these are commemorated in the Arabian Nights, which lauds the weird beauty of the sands skirting the Mountain of the Bell, the Jebel Nagous of the Isthmus of Suez. When whipped up by storm winds, these sands chant and groan like deep organ notes; on calm days, they tinkle like bells.

    (C) 1998 Lena Lencek and Gideon Bosker All rights reserved. ISBN: 0-670-88095-7

    Labels:


     

    Cuevas del Drach, Isla de Mallorca


    Cuevas del Drach

    Coves del Drac aka The Caves of Drach aka Dragons Cave


    Useful Information

    Location:Mallorca. 1.5km South of Porto Cristo, East coast. (39°32'N6.15", 3°19'51.53"E)




    Classification: Karst cave. (see post below, Within Her Secret Depths...)
    Light:electric.
    Dimension:T=20°C, H=80%. Subterranean lake: L=177m, W=30m, D=9m.


    Address:Cuevas del Drach, Carretera Cuevas, E-07680 Porto Christo, Mallorca, Tel: +34-971-820753, Fax: +34-971-815089. E-mail: contact


    History




    1338first written notice of the cave, in a message of Roger de Rovenach, Governor of the island, to the mayor of Manacor.
    1632first appearance of the name "drach" in the book "History of the Kingdom Mallorca" by Demeto.
    1778mentioned in Berard y Solà: A Journey through the Internal Mallorca.
    1784included into the Mallorca map of Cardinal Despuig.
    1878cave visited by two tourists from Barcelona.
    1880first map of the cave drawn by the German cartographer a speleologist M. F. Will, published in Munich.
    1881second edition of Will's map published in Palma.
    1895mentioned in the book Clovis Dartentor by Jules Verne.
    1896exploration by E. A. Martel, discovery of the Cueca de los Franceses.
    17-JUN-1922cave bought by Don Juan Severa and his wife Angela Amer Nadal. They immediately start the development of the caves.
    1925the trails are completed.
    1929new entrance tunnel dug.
    23-APR-1935the electric light, made by Carlos Buigas, was inaugurated. Buigas was so happy with this work, that he refused to accept any payment for 5 months of work!
    1950light redone by Buigas.
    1951archaeologic excavation revealed arabic caramics (3000 years old), Bronze Age, Punic, and Roman remains.

    Description

    Cuevas del Drach is the most famous and best visited cave on Mallorca. The reasons are probably its outstanding features, like the wealth of speleothems and the impressive underground lake. It may also be a result of very good marketing, but the cave is really worth a visit. There are numerous stalactites and stalamites of pure white colour. At some parts of the ceiling, the stalactites are covered by helictites, on others there are fragile soda straws.

    The cave visits are scheduled hourly, visitors walk on their own into the cave. The tour is more than two kilometers long, so there is not very much time to reach the Lago Martel. The chamber of the lake is equipped with seats for about 1,000 visitors, who listen here to short concert with classical music. There is also the possibility to make a boat ride, but this is voluntary.

    The concert is held by some musicians on three boats, who glide silently into the lake to play their lake concert. They play Alborada qualleqa by Caballero, Plaisir d'amour by Martini, Tristesse, study 3 opus 10, by Frederik Chopin, and Barcarola from Hoffman's Tales by Jaques Offenbach. The music is available on CD.

    It seems, the opinions about this cave differ very much, they are controversial. Many people regret that there is not enough time to enjoy the cave and its speleothems, others think the concert is kitschy. At the end everybody has to make up his own opinion. To avoid the crowded times, it is probably a good idea to take the first or last tour, or visit the cave during the winter.

    The name Cuevas del Drach is, of course, derived from the dragon. The first inhabitants of Mallorca gave the dragon rather different attributes: on one hand, he is evil, a sort of devil, on the other hand he is a symbol for strength. This second aspect was definitely the reason, why King Jaime I is shown on the medieval paintings of Francesc Comes and Pere Nisart with the dragon on his helmet. In the medieval legends, in the Rondaies mallorquines, the most important collection of mallorcan fairy tales, the dragon has a third aspect: he is the sentinel of a treasure. With his horrible looks, snake like body and bat like wings, and his enormous strength, he defends the treasure against intruders.

    The cave was visited during centuries, an example is a cave visit by two tourists from Barcelona in 1878. They astrayed, although they had a local guide, and they nearly died of starvation in the cave.

    The most famous name in the history of the cave is E.A. Martel. He arrived early September 1896, after an invitation of Archduke Ludwig Salvator, who lived in Miramar. On the 9th September he entered the cave the first time. Until then three chambers where already known: Cueva Negra (Black Cave), Cueva Blanca (White Cave) and Cueva Luis Salvator. At the end of this third chamber was a place called La ventana (the window) where terra inkognita started.

    La ventana allowed a view on an enormous lake. Martell used his new developed gear, which were in fact two boats, to cross this lake, which is today called Lago Martel (Lake Martel) to his honor. He was rather impressed by this silent boat tour on one of the world's largest subterranean lakes, 177m long and 30m wide. Lago Martel has a temperature of 17°C and is a little salty, which proofs a subterranean connection to the Mediterranean Sea. Behind the lake he discovered a new part of the cave, today called Cueva de los Franceses (Cave of the French), also to his honor.

    The members of this expedition where Martell, his companion Luis Armand, Fernando Moragues, son of the cave owner, and Pedro Bonel de los Herreros, grandson of Ludwig Salvator's steward.


    See also


    Main Index Spain Mallorca
    Last updated



    08/23/2006 17:00:51, Terms of Use, © Jochen Duckeck.


    Labels:


     















    There are limestone caves dotted all over Majorca, although the best known ones are the "Cuevas del Drach" which are situated just outside the pleasant little marina town of Porto Cristo. The caves appear to be on every bus trip tour of the Island , so if you visit in the afternoon then be prepared to part of a milling throb of people.

    The caves themselves are spectacular with thousands of stagaltites and stalagmites to see in the various caves. Towards the end of the walk you enter a much larger cavern with a large lake in front of it. Maybe a thousand people are seated ready for the performance to begin. We were expecting a sound and light show to really 'show-off' the main cave perhaps the Ride of the Valkyries or the 1812 overture played at full pelt. Instead three little gondolas with lights around their plimsol lines eeriely came out of the shadows with their oarsman dressed in black hooded capes. The middle boat also contained a cloaked man playing haunting tunes on his Yamaha electric organ and a violinist. It put me very much in mind of the Greek legand of the underworld where Charon rows you across the river Styx on your journey from this world to the next. The crowd seems quite ecsatic, although I`m not sure if they were just easily pleased or taking the mick out of it all ! After the performance you can continue the walk through the last cave or take a very short boat trip. If the place is full you will be waiting a long time for your personal ride across the river Styx.
    Lea

    Labels:


    Friday, September 22, 2006

     

    Within Her Secret Depths, Nature Carves and Sculpts

    What is Karst?Karst is best described as a region characterized by sinkholes, underground streams, and caverns. These underground conduits are typically formed by acidic rain water dissolving certain types of soluble bedrock over thousands to millions of years. Karst areas are typically devoid of surface water as all the water is diverted through underground channels. The main theme in karst regions is underground drainage. http://www.karstconservancy.org/karst/what-is-karst.asp

    http://www.karstconservancy.org/karst/photos-of-karst.asp

    http://www.karstconservancy.org/karst-links.asp

    Karst Almighty: http://members.shaw.ca/karst.almighty photos around world

    Australian Coastal Cave


    DEPOSITS IN LU DI (REED FLUTE) CAVE, GUILIN, GUANGXI, CHINA photos of Karst terrain and formations: TowerKarst -http://www.tylersterritory.com/travel/china/guilin/li/li-03.html

    Stone Forest (Shilin) http://www.terragalleria.com/asia/china/shilin/shilin.all.html


    DESOTO CAVERNS, ALABAMA
    DESOTO CAVERNS, ALABAMA
    SEQUOYIA CAVERNS, ALABAMA


    Marvelous slide show of caverns. Indian Echo Cavern, Hummelstown,Pa.;Wyandette Caverns, Leavenworth, In.; Caverns of Sonora, Sonora, Texas.

    Click on "gallery" in header to access photos. Click on small photos to view enlargements. Click on arrows to advance to next set of photos.

    http://www.cavern.com


    2. Mae U-su Cave, Mae Moei National Park, Tak Province
    (426 km north of Bangkok)
    Mae U-su Cave, the most beautiful cavern of the west of Thailand, is a masterpiece of streams whose everlasting blow has eroded the gigantic limestone and turned it into an enormous cave. Magnificent are the stalagmites and stalactites sculptured by nature. Underneath the cave, you will find to your astonishment that there are both warm and cool streams running through it.

    Labels:


    Sunday, September 10, 2006

     

    Craters of the Moon in Idaho

    Welcome to Craters of the Moon National Monument

    The monument is a geologic wonder cast in a wild and remote landscape. Its central focus is the Great Rift, a 62-mile long crack in the earth's crust. The Great Rift is the source of a remarkably preserved volcanic landscape with an array of exceptional features. Craters, cinder cones, lava tubes, deep cracks, and vast lava fields form a strangely beautiful volcanic sea on central Idaho's Snake River Plain.
    Volcanic eruptions first occurred at Craters of the Moon about 15,000 years ago. The most recent eruptions ended about 2,100 years ago and were likely witnessed by the Shoshone people. A Shoshone legend speaks of a serpent on a mountain who, angered by lightening, coiled around and squeezed the mountain until liquid rock flowed, fire shot from cracks, and the mountain exploded.
    The volcanic area now lies dormant, but its eight eruptive periods formed 60 lava flows which traveled as far as 45 miles from their vents. Some of the lava flowed around areas of higher ground, forming isolated islands of vegetation called "kipukas". Today, these kipukas provide a window on the vegetation communities of the past. They contain some of the last pristine vegetation in the Snake River Plain, including 700-year-old juniper trees and relic stands of sagebrush and native bunchgrass.


    Spatter Cones ............
    Silent Cone - Life proliferates as the rock breaks down in older cones and flows
    Broken slabs of lava flows.......
    North Crater Lava Flow
    Lava Cascades and a lone, determined plant
    Life gains roots near Inferno Cone. As volcanic rock breaks down, it is rich in plant nutrients.
    Springtime brings hardy life to a dead landscape.
    Rippled Lava Flows
    Rippled Lava Flow......................
    Lichens grow on lava rock where nothing else will grow. Life is tenacious.
    North Crater Lava Flow
    North Crater Trail....
    Hikimg Trail through an infernal landscape
    Dew Drop Cave........................
    Inferno Cone - Sideview
    Inferno Cone...........
    Over the millenia life struggled for a foothold in a dead landscape.
    Monument to Struggle for Life- a dead tree
    The Devil's Orchard
    Entrance to Indian Tunnel - Lava Tube
    Indian tunnel skylight
    Indian Tunnel hiking
    Wildflowers in cinders............
    It has maps and info on cool adventures to check out this summer! http://www.avalancheweekends.msn.com/default.aspx?page=weekend&article=11&source=email

    Awesome remnants of volcanic activity in the past

    For more thumbnail adventure spots, click on titles in left sidebar

    More Images of Craters of the Moon, Idaho

    http://volcano.und.edu/vwdocs/volc_images/north_america/craters_of_the_moon2.html


    Labels:


    Archives

    May 2006   June 2006   September 2006   October 2006   December 2006   January 2007   February 2007   May 2007   November 2007   December 2007   January 2008   March 2008   April 2008   July 2008   August 2008   October 2008   November 2008   December 2008   February 2009   March 2009   May 2009   July 2009   August 2009   September 2009   October 2009   November 2009   December 2009  

    This page is powered by Blogger. Isn't yours?

    Subscribe to Posts [Atom]