About the Calcareous shale or marl, FGDC 623 hatch pattern
Calcareous shale or marl lithology symbol, horizontal dashes with vertical ticks. FGDC geologic map lithology pattern 623, 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.