a) a welded wire face mat having {HEAD ~ an upright portion} of {TAIL ~ an extended height} for disposition over a portion of the face of the formation 
of
a ) a welded wire face mat having { HEAD ~ an upright portion } of { TAIL ~ an extended height } for disposition over a portion of the face of the formation
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 OTH OTH OTH