About the Igneous rock (4th option), FGDC 724 hatch pattern
Igneous rock (4th option) lithology symbol, scattered angle marks. FGDC geologic map lithology pattern 724, 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.