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