About the Dolostone or dolomite, FGDC 642 hatch pattern
Dolostone or dolomite lithology symbol, brick courses with slanted ticks. FGDC geologic map lithology pattern 642, 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.