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