a frew more symbols useful for mapping structural geology

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@60504 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/symbol/symbol/geology/circle_cross

@@ -0,0 +1,20 @@
+VERSION 1.0
+BOX -1 -1 1 1
+POLYGON
+    RING
+    ARC 0 0 1 360 0 C
+  END
+END
+STRING
+  LINE
+    0 -1
+    0 1
+  END
+END
+STRING
+  LINE
+    -1 0
+    1 0
+  END
+END
+

lib/symbol/symbol/geology/strike_cleavage

@@ -0,0 +1,10 @@
+VERSION 1.0
+BOX -0.5 -0.5 0.5 0.5
+STRING
+  LINE
+    -1 0.3
+    -1 0
+     1 0
+     1 0.3
+  END
+END

lib/symbol/symbol/geology/strike_parallel

@@ -0,0 +1,14 @@
+VERSION 1.0
+BOX -0.5 -0.5 0.5 0.5
+STRING
+  LINE
+    -1 -0.2
+     1 -0.2
+  END
+END
+STRING
+  LINE
+    -1 0.2
+     1 0.2
+  END
+END