They descended warily, not risking a fall on the unstable slope.

The complaint contends that the extra logging led to environmental damage to unstable slopes along several riverbeds.

The villages were built on unstable slopes.

The slide was caused by heavy rain and an unstable slope.

There are a large number of "social trails" as well, which often climb steep, unstable slopes, increasing erosion and overall stream degradation.

The plant is native to unstable slopes, flowering from July to August.

This condition is hard to find in unstable slopes, therefore electro-osmotic treatment, after some applications, has been abandoned.

I still struggled to retain my footing on the unstable slope.

Really unstable slopes had been shaken down long ago.

Its unstable slopes are primarily made of pyroclastic rock.