In one embodiment, the face mat has a relatively short floor portion for extension into the earthen formation and {HEAD ~ an upright portion} of {TAIL ~ an extended height} for disposition over the face of the formation 
of
In one embodiment , the face mat has a relatively short floor portion for extension into the earthen formation and { HEAD ~ an upright portion } of { TAIL ~ an extended height } for disposition over the face of the formation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH