The Venus Geologic Mappers' Handbook

Appendix B: Samples of Geologic Map Symbols

[Notes in brackets]

	Contact--Long dashed where approximately located; short dashed where indefinite, gradational, or inferred; dotted where concealed; queried where doubtful
	Fault or graben--Long dashed where approximately located; short dashed where inferred or probable; dotted where concealed [must be concealed by overlying mapped deposits]; bar and ball on downthrown side
	Fault--Arrows show relative horizontal movement
	Thrust fault--Sawteeth on upper plate; dashed where approximately located; intermittent dashed where inferred; dotted where concealed
	Fault or lineament--Origin uncertain
	Tectonic lineament [Used on small-scale tectonic maps]
	Joint [Assumed to be vertical]
	Ridge crest
	Trough
	Depression [Includes large volcanic craters]
	Scarp--Barb points downslope, line at base
	Flow scarp--Hachures on downslope side
	Channel
	Crater rim crest--Dotted where buried
	Small shield [Less than 20 km across]
	Large shield [More than 20 km across]