Chinese scholars began to collect them during the Song Dynasty (960 to 1279), seeking inspiration in their folds and ridges.
Beyond is a rocky crag of brown paper; you wonder at how crumpled paper can imitate the folds and ridges of rock.
The creation of the artist Ursula Henzler, a textile soaked in plaster and pulled into folds and ridges, is set up as a comparison to the large earth-colored slabs of fossil patterns.
The south polar terrain is marked by a striking set of 'blue' fractures and encircled by a continuous chain of folds and ridges, testament to the forces within Enceladus that have yet to be silenced.
In Egyptian and some Mesopotamian statues can be seen the same renderings of parallel, slanting, and radiating folds and ridges, as well as the archlike hemline that allows the feet to protrude.
White, white, white — at first that's all I can see, not the jungly hills I've imagined, or the bright flashes of equatorial birds — nothing more than streaming curtains of cloud creeping up valleys, folding over ridges, veiling the world.
Although much of the sea floor around the Earth is bare, sandy bottom, the sea floor off Southern California is pleated with rocky folds and ridges that harbor unique sea life.
Fold the ridge on the back in on itself towards the tail.
The anterior and posterior walls of the canal each have a vertical fold, from which ridges run diagonally upwards and laterally.
The work began with a classification of patterns into specific categories: wrinkles, creases, folds, period doubles, ridges, and delaminated buckles.
