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FOLIATION REF NO DESCRIPTION SYMBOL CARTOGRAPHIC SPECIFICATIONS NOTES on USAGE 8.1—Foliation and Layering in Igneous Rock

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FOLIATION REF NO DESCRIPTION SYMBOL CARTOGRAPHIC SPECIFICATIONS NOTES on USAGE 8.1—Foliation and Layering in Igneous Rock Federal Geographic Data Committee U.S. Geological Survey Open-File Report 99–430 Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization PostScript Implementation (filename: of99-430_08-01.eps) 8—FOLIATION REF NO DESCRIPTION SYMBOL CARTOGRAPHIC SPECIFICATIONS NOTES ON USAGE 8.1—Foliation and layering in igneous rock dot diameter .5 mm 1.25 mm May be used separate- 8.1.1 Massive igneous rock ly or in combination with other symbols. 90° lineweight .15 mm For individual symbols other than horizontal 8.1.2 Horizontal flow foliation or layering in igneous rock 1.75 mm foliation and massive diameter 2.5 mm 60° igneous rock, point of 5.0 mm HI-6 observation is midpoint Inclined flow foliation or layering in igneous rock— 10 8.1.3 10 .875 mm of strike line. Showing strike and dip 60° lineweight .15 mm For combined symbols, point of observation is 1.75 mm 8.1.4 Vertical or near-vertical flow foliation or layering in the junction point com- igneous rock—Showing strike mon to all strike lines. 60° Use symbol for mas- Inclined crinkled or deformed flow foliation or 5.0 mm HI-6 sive igneous rock at lo- 20 20 8.1.5 layering in igneous rock—Showing approximate .375 mm .875 mm cality where foliation strike and dip lineweight .15 mm 60° 1.0 mm radius and lineation are ab- sent. Vertical or near-vertical crinkled or deformed flow 1.75 mm 8.1.6 foliation or layering in igneous rock—Showing Use ball indicating approximate strike 60° known top direction of layers only on maps lineweight .15 mm .55 mm where top direction 8.1.7 Horizontal cumulate foliation parallel to layering in igneous rock may be in doubt else- diameter 2.5 mm where. lineweight .15 mm HI-6 Inclined cumulate foliation parallel to layering in 45 45 8.1.8 .875 mm .5 mm igneous rock—Showing strike and dip 5.0 mm Inclined cumulate foliation parallel to upright layering 30 8.1.9 in igneous rock—Showing strike and dip. Top 30 direction of layers known from local features dot diameter .75 mm 8.1.10 Vertical or near-vertical cumulate foliation parallel 2.25 mm to layering in igneous rock—Showing strike Vertical or near-vertical cumulate foliation parallel 8.1.11 to layering in igneous rock—Showing strike. Ball shows top direction of layers where known from local features dot diameter .75 mm Inclined cumulate foliation parallel to overturned underbar interrupted 70 around dip symbol 8.1.12 layering in igneous rock—Showing strike and 70 dip .625 mm radius Inclined cumulate foliation parallel to overturned 80 8.1.13 layering in igneous rock—Showing strike and dip. 80 Top direction of layers known from local features dot diameter .75 mm 5.0 mm Inclined crinkled or deformed cumulate foliation in HI-6 15 15 tick length 8.1.14 .875 mm layered igneous rock—Showing approximate .375 mm .3 mm strike and dip 1.0 mm radius lineweight .15 mm Vertical or near-vertical crinkled or deformed 8.1.15 cumulate foliation in layered igneous rock— 2.25 mm Showing approximate strike diameter 2.75 mm 8.1.16 Horizontal compaction foliation in ash-flow tuff ° lineweight .15 mm 60 5.0 mm Inclined compaction foliation in ash-flow tuff— 20 20 8.1.17 Showing strike and dip .875 mm HI-6 .5 mm lineweight .15 mm Vertical or near-vertical compaction foliation in 8.1.18 1.5 mm ash-flow tuff—Showing strike Inclined crinkled or deformed compaction foliation 1.0 mm radius HI-6 25 25 8.1.19 in ash-flow tuff—Showing approximate strike .875 mm .375 mm lineweight 5.0 and dip .15 mm mm Vertical or near-vertical crinkled or deformed 8.1.20 compaction foliation in ash-flow tuff—Showing 1.75 mm approximate strike A–8–1 Federal Geographic Data Committee U.S. Geological Survey Open-File Report 99–430 Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization PostScript Implementation (filename: of99-430_08-02.eps) 8—FOLIATION (continued) REF NO DESCRIPTION SYMBOL CARTOGRAPHIC SPECIFICATIONS NOTES ON USAGE 8.2—Foliation and layering in metamorphic rock diameter 2.5 mm 1.75 mm May be used separately 8.2.1 Horizontal foliation in metamorphic rock or in combination with lineweight .15 mm 60° other symbols. 5.0 mm For individual symbols Inclined foliation in metamorphic rock—Showing 10 10 HI-6 8.2.2 .875 mm other than horizontal fo- strike and dip lineweight .15 mm liation, point of observa- 60° tion is midpoint of strike line. 1.75 mm 8.2.3 Vertical or near-vertical foliation in metamorphic rock—Showing strike For combined symbols, 60° point of observation is Inclined crinkled or deformed foliation in 5.0 mm HI-6 the junction point com- 40 40 mon to all strike lines. 8.2.4 metamorphic rock—Showing approximate strike .375 mm .875 mm and dip lineweight .15 mm 60° 1.0 mm radius Use ball indicating known top direction of Vertical or near-vertical crinkled or deformed 1.75 mm beds only on maps 8.2.5 foliation in metamorphic rock—Showing where top direction may approximate strike 60° be in doubt elsewhere. diameter 2.5 mm lineweight .15 mm 8.2.6 Horizontal foliation parallel to bedding in 1.75 mm metamorphic rock 60° HI-6 5.0 mm Inclined foliation parallel to bedding in 45 45 8.2.7 .75 mm metamorphic rock—Showing strike and dip .875 mm 60° Inclined foliation parallel to upright bedding in 35 35 8.2.8 metamorphic rock—Showing strike and dip. Top direction of beds known from local features dot diameter .75 mm 8.2.9 Vertical or near-vertical foliation parallel to bedding 3.25 mm in metamorphic rock—Showing strike 60° Vertical or near-vertical foliation parallel to bedding 8.2.10 in metamorphic rock—Showing strike. Ball shows top direction of layers where known from local features dot diameter .75 mm Inclined foliation parallel to overturned bedding in 75 75 8.2.11 metamorphic rock—Showing strike and dip .625 mm radius Inclined foliation parallel to overturned bedding in 85 85 8.2.12 metamorphic rock—Showing strike and dip. Top direction of beds known from local features dot diameter .75 mm A–8–2.
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