About the Cherty limestone (2nd option), FGDC 640 hatch pattern
Cherty limestone (2nd option) lithology symbol, brick courses with a few ovals. FGDC geologic map lithology pattern 640, 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.