About the Cherty limestone (1st option), FGDC 639 hatch pattern
Cherty limestone (1st option): brick courses with small ovals in close rows. FGDC geologic map lithology pattern 639. Redrawn from the USGS chart.
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.