Visit North America’s Tallest Dunefield
The American Southwest has the greatest concentration of sand dunes on the North American continent, with more than two dozen notable dunefields. Many of these are national parks and monuments, state parks, or recreational areas that are managed by the federal Bureau of Land Management. Together, they attract millions of visitors each year. None of the Southwest’s dunefields are alike. New Mexico’s White Sands National Monument is famed for its glistening, white dunes of pure gypsum, while the dunes of Utah’s Coral Pink Sand Dunes State Park consist of distinctively colored, reddish sand derived from Navajo Sandstone. Some dunefields are only a few square miles in area, while California’s Algodones Dunes, the largest in the nation, cover 300 square miles.
One of the best known of these dunefields is in Colorado’s Great Sand Dunes National Park and Preserve. Its namesake attraction is the Great Sand Dunes—a 33-square-mile deposit of dramatically sculpted sand that is nearly devoid of vegetation. This dunefield is crowned by the continent’s tallest dune— Star Dune, which soars 755 feet from base to crest. And nestled at the base of a range of 14,000-foot-high peaks, the Great Sand Dunes are unmatched for scenic splendor.
But the Great Sand Dunes is far more than spectacular scenery. Constantly migrating, eroding and rebuilding, these dunes are a place where geology comes alive, where legends thrive, and where plain old sand takes on a whole new perspective.
ãã®èšäºã¯ Rock&Gem Magazine ã® March 2017 çã«æ²èŒãããŠããŸãã
7 æ¥éã® Magzter GOLD ç¡æãã©ã€ã¢ã«ãéå§ããŠãäœåãã®å³éžããããã¬ãã¢ã ã¹ããŒãªãŒã8,500 以äžã®éèªãæ°èã«ã¢ã¯ã»ã¹ããŠãã ããã
ãã§ã«è³Œèªè ã§ã ?  ãµã€ã³ã€ã³
ãã®èšäºã¯ Rock&Gem Magazine ã® March 2017 çã«æ²èŒãããŠããŸãã
7 æ¥éã® Magzter GOLD ç¡æãã©ã€ã¢ã«ãéå§ããŠãäœåãã®å³éžããããã¬ãã¢ã ã¹ããŒãªãŒã8,500 以äžã®éèªãæ°èã«ã¢ã¯ã»ã¹ããŠãã ããã
ãã§ã«è³Œèªè ã§ã? ãµã€ã³ã€ã³
MORGAN HILL POPPY JASPER
In California, there are very few places to collect semi-precious stones. Many locations from the past have been either exhausted of the material or the land has been developed.
THE ACORN
The briolette gemstone has the same design attributes of a regular gemstone, however, the pavilion is elongated and the crown is usually domed. This is perfect for an elegant pendant, earrings or a pendulum.
HOW TO PUT A PROTECTIVE CAP ON A CAB
To protect a specimen cab, often a cap is needed. In my case, I had a slab with the because of the color of the background and the pattern. This background had a more silicified consistency than most sandstones. It had no graininess like most sandstone, so I'm inclined to compare it to a jasper. The pattern was typical of a dendrite.
The Resilient Revival of Anne Brontë & Her Stones
For the first time, the Anne Brontë rock collection underwent complete description and identification, and along with Professor Hazel Hutchison of Leeds University and Dr. Enrique Lozano Diz at ELODIZ (a company specializing in spectroscopy analysis), an analysis of that collaboration, Anne Brontë and Geology: A Study of her Collection of Stones, was published in April 2022 in Volume 47, Issue 2 of the peer-reviewed journal, Brontë Studies & Gazette.\"
Amazing Women with Rock-Solid Careers
Explorers, Geologists, Educators & Jewelry Makers...
The Case of the Bleeding Glacier
It's a gory sight called Blood Falls. Ever since British geologist Thomas Griffith Taylor first noted it in 1911, it has been a mystery.
Asteroid Samples Are Said to Hold Invaluable Secrets
If Only Scientists Can Pop the Lid!
Paleontologists Embrace a New Method for Seeing Fossils within Rock
Fossil bone can be delicate. Attempts to remove it from a hard rock matrix by picking and scratching or etching with acids can be time-consuming and/or may end up obliterating that which you hope to study.
Need a Map of the Ocean Floor?
Call in the Seals!
A Step Closer to Hydrogen, the "Climate-Friendly Fuel"
As I reported last June, the world is racing to find sustainably renewable, nonpolluting sources of energy to replace our carbon-based reserves of coal, oil and gas.