About the Bedded chert (1st option), FGDC 649 hatch pattern
Bedded chert (1st option) lithology symbol, interlocking elongated lens shapes. FGDC geologic map lithology pattern 649, 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.