In the center of this area is a thin, longitudinal fissure which opens into the birth canal.

A thin fissure ran in a diagonal, from a point a hundred feet down to another twice as far.

Once all the obvious lines had been tried, climbers looked for more technically challenging routes (e.g. an all-rock route threading between icefields or a single thin, fissure running in a continuous straight line from base to summit).

As Jayge got to his feet, he was surprised to see a dim light coming from a thin fissure far above their heads.

The line ended suddenly, but when he looked closely he saw that it went straight up now, a thin vertical fissure in the rock.

It was a thin fissure opened by the shifting cavern.

Shields: They are being developed as the water comes out through very thin fissures of the rock.

Hearst's thin mouth ceased to be a mouth; a thin fissure now split the white face.

He had seen a streak of darkness above, a thin fissure revealed by the light of the setting sun.

In the center of the area you can see a thin, longitudinal fissure which opens into the birth canal.