# Strike, dip direction and dip of overturned beds

    # Symbols made for GMT by Jose A. Alvarez-Gomez
    #
    # Geological symbol: Plane Inverted
    #
    # The symbol reads the strike and dip in the 3rd and 4th columns in psxy
    #
    N: 2 ao
    if $1 [> 0:90 then 0.5 -0.5 0.3 $2 l+fHelvetica-Oblique+jBR -W-
    if $1 [> 90:180 then 0.5 0.5 0.3 $2 l+fHelvetica-Oblique+jTR -W-
    if $1 [> 180:270 then -0.5 0.5 0.3 $2 l+fHelvetica-Oblique+jTL -W-
    if $1 [> 270:360 then -0.5 -0.5 0.3 $2 l+fHelvetica-Oblique+jBL -W-
    $1 R
    0 0 1 y
    -0.0625 0.25 0.126 -
    -0.0625 0 0.126 -
    -0.125 0.125 0.25 90 270 m
    0.125 0 0.25 -