About the Bedded chert (2nd option), FGDC 650 hatch pattern
Bedded chert (2nd option) lithology symbol, closely interlocking elongated lens shapes. FGDC geologic map lithology pattern 650, 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.