About the Sandy or silty shale, FGDC 619 hatch pattern
Sandy or silty shale lithology symbol, close rows of dots and dashes. FGDC geologic map lithology pattern 619, 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.