Now, a combined acoustic and seismological study of California dunes points to a natural internal structure that amplifies the sound of sliding sand at select frequencies.
Due to geological structure, landform and complex submarine dynamic conditions, Baiyun Depression in NSCS has well developed landslide mass, sliding sand slope, large erosion gullies, submarine scarps and other unstable landforms; it is an area with rather unstable submarine engineering geological conditions in NSCS.
Then there are anomalies like the park's Racetrack Playa, where rocks seemingly slide across sand under their own power.
It is a heap and a slide of sand, an extract of the outside, perhaps from the seaside, perhaps from a builder's site, but now it's been taken inside, and put on stage.
As a result, the backyard slides and sand turtles, get passed on from generation to generation like a grandmother's best jewelry.
For £20 you get your own skipper and a day to wander aimlessly, cartwheeling along endless deserted beaches, sliding down sand dunes and snorkelling with tropical fish.
For the dusty Silk Road on GE's 26-day "Frontiers of Inner Asia" tour, the light and comfortable Nike Air Wild Goat's sticky rubber soles will keep you from sliding down sand dunes {$80 www.nike.com}.
Journey is worth your time, if only for sliding down sand dunes, but don't go into it expecting total unconventionality.
Otoliths were then cleaned and placed in epoxy on a microscope slide and sanded with lapping film to the level of the otolith core.
"I'll never forget when I showed the revised plan to Julie, she said 'You can do all that in that space?' " Teardrop Park has been packed even more densely with features by its designers at Michael Van Valkenburgh Associates: lawns, a reading circle with rock perches, wooden bleachers, a wading pool, a sand slide and sand lot.
