About the Porphyritic rock (1st option), FGDC 729 hatch pattern
Porphyritic rock (1st option) lithology symbol, scattered double parallel dashes. FGDC geologic map lithology pattern 729, for map and section drawings.
Kind: a repeated motif that does not fill the plane.
The download is one AutoCAD .pat file. Downloads are metered; a Hatchy Pro license lifts the limit.