Ainda não temos significados para "friable rock".
1I didn't want to descend the route we'd climbed, with its friable rock.
2The friable rock forming the spires and towers and pinnacles crumbles away under a slight pressure.
3The splintered rock presents little for summertime climbers, but winter temperatures provide solid ice on top of otherwise friable rock.
4These ashes had been converted by time into a soft, or friable rock, composing a stone that is called tufa.
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