As these lava flows cooled and solidified on unstable, shifting ground, they became compressed, resulting in 'wrinkle ridges'.

Source: https://phys.org/news/2023-01-deep-fractures-water-carved-valleys-mars.html

By the 13th week of gestation, the first indentations in the fingertips, known as primary ridges, start to form.

Source: https://thestute.com/2023/03/10/why-dont-identical-twins-have-the-same-fingerprints/?utm_source=rss&utm_medium=rss&utm_campaign=why-dont-identical-twins-have-the-same-fingerprints&utm_source=rss&utm_medium=rss&utm_campaign=why-dont-identical-twins-have-th

Every single step you take is breathtaking," she said during a 15-kilometre walk in the park that traversed some of the ancient beach ridges that used to form the coast of Hudson Bay.

Source: https://www.cbc.ca/news/canada/manitoba/inside-wapusk-national-park-1.6943338?cmp=rss

In 1998 Indonesia’s central government granted DPM a contract of work to mine beneath the highland ridges in the Barisan mountain range.

Source: https://southafricatoday.net/environment/sumatra-women-farmers-celebrate-court-win-against-china-backed-zinc-mine/

Severe could also create ridges and other changes to the nails."

Source: https://www.mirror.co.uk/news/health/what-ridges-your-nails-mean-30801142

Then the ridges get deeper and uglier.

Source: https://variety.com/2023/film/reviews/sick-of-myself-review-1235583836/

The weather service updated its winter weather advisory around 11 a.m., removing Allegheny, Washington and Green counties and most of Westmoreland and Fayette counties except for the eastern ridges.

Source: https://triblive.com/local/regional/forecasters-studying-wednesday-storm-that-could-impact-morning-commute/

Third, and most importantly, it would allow Albanese and Labor to refocus and sharpen their agenda, a program that on paper and around the ridges is beginning to look much greater than the sum of its parts.

Source: https://thenewdaily.com.au/opinion/2023/10/11/albanese-voice-deflect-attention/

When molten silver or gold flows into the mold, it settles into the cuttlebone’s narrow ridges, transferring the natural design to the metal’s surface.

Source: https://www.nytimes.com/2023/10/27/fashion/jewelry-native-american-casting-molds.html

Wind may be on the gusty side over the next several days for parts of the coast and on some interior ridges.

Source: https://theava.com/archives/224187