About the Igneous rock (8th option), FGDC 728 hatch pattern
Igneous rock (8th option) lithology symbol, double-barred crosses in rows. FGDC geologic map lithology pattern 728, 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.