About the Porphyritic rock (2nd option), FGDC 730 hatch pattern
Porphyritic rock (2nd option) lithology symbol, scattered open rectangles. FGDC geologic map lithology pattern 730, 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.