Definitions

cairn (kârn) (Click to hear it)
n.

• A mound of stones erected as a memorial or marker.  

  [Middle English carne, from Scottish Gaelic carn, from Old Irish.]

  cairned adj.

• teva adds: a cairn is a stacks of rocks
  used to identify the trail
  usually on rock surfaces where the trail isn't obvious
  especially around turns
  it's a good rule of thumb, if you're on a cairned trail and you don't see
  one for a while, stop and look around, it may be a good time back track and
  find where you missed the last turn before getting real lost

car•a•bi•ner also kar•a•bi•ner (kr-bnr) (Click to hear it)
n.

• An oblong metal ring with a spring clip, used in mountaineering to attach a running rope to a piton or similar device.
• German Karabiner, short for Karabinerhaken, hook for a carbine, from Karabiner, carbine, from French carabine.

gulch (glch) (Click to hear it)
n.

• A small ravine, especially one cut by a torrent.

pseu•do (sd) (Click to hear it)
adj.

• False or counterfeit; fake.

sac•a•ton (sk-tn) (Click to hear it)
n.

• A tufted perennial grass (Sporobolus wrightii) of the southwest United States, used for pasture and hay in arid regions

scree (skr) (Click to hear it)
n.

• Loose rock debris covering a slope.

• A slope of loose rock debris at the base of a steep incline or cliff.