1024 



Subsurface Geologic Methods 



STRUCTURAL LEGEND 



LITHO- COMPOSITIONAL LEGEND 



Compositional Structure 



Planar; double- barbed dip symbol 

 Layers 

 Beds 

 Faults 

 Veins 



Flow structure 

 Fold- axial plane 



Anticline 



Syncline -j^ 



Linear: single-barbed dip symbol 

 Striae ^iS^ 



Slickensides '^^wa 

 Folds '°° 



Crest fior. proi. §>^ 3^ 



— ^ 30° 30° 



Left drag ^?>30° ~^3o° 



Right drag =yC S^ 



Flow structure 



Lineation 'J^~^ 



MInerol 



Linear flow ^ — jc 



Non-compositionol Structure 

 Planar: no barbs on dip symbol^. 



Jointing 



Schistosity 



■A 



Linear: no- barbs on dip symbol 

 Cross folding -=^2--! 



Displacement 



Direction 

 Up 

 Down 

 Direction 

 Apparent 

 Real 

 Amount 



Apparent 

 Real 



30VT" 



(+) I-) 



(+ 30) 



+ 30' 



T=^ 



TEXTURAL LEGEND 



Lenticular 

 Augen 



Clastic, 

 Pyroclostic 



Glassy 



Vitrophyric 



Aphanifie 



Apfianife Por. 



Phaneritic 



Phanerite Por. 



Pegmatitic 



Aplitic 



Groptiic 



■^ ■> <s<''^ » "=?'/,'''/ f 





NON-TECTONIC 



Sedimentar y 

 Conglomerate 

 Arkose 

 Sandstone 

 Shale 

 Limestone 

 Dolomite 



'O.-oOO.'O'- 



III r-^ 



Red brown background 



Ultromorine background 

 Venus Unique 1210 



-Compositional colors 

 ore those listed 

 under Moq motic 



IGNEOUS 



Ullrobasic 

 Augite Pheno. 

 Basic 



Hb.Bio, Pheno. 

 Intermediate 



Plagio. Pheno. 



Intermediate Peg. 2 



Acid, Orthoclase 



Pheno. 

 Acid Peg. 



Quoriz Pheno. 

 High Sil. Peg. 



Bull Quartz 



Dolomitization 

 Chloritizotion 

 Argillization 

 Sericitization 

 Garnetizotion 

 Silicification 

 Pyritizotion 

 Fissure filling 

 Quartz 

 Metollizotion 

 tvletolL-Peg. 



STRUCTURAL 

 Fault Clay 



Dull purple 



Venus Unique 1210 

 Ullramorine 



Venus Unique 1236 

 Sea green 



Verithin 737 1/2 

 Azure 



Dixon Thinex 393 

 Green 



Van Dyke 5826 

 Emerald green 



Verithin 751 

 Apple green 



Dixon Thinex 389 



Purple 



Venus Unique 1210 

 Yellow 



Orange 



Pink 



Dark red 



Venus Unique 1227 

 Red ' 



Venus Unique 1207 

 Purple 



Van Dyke 5614 



Red 



Venus Unique 1207 



Figure 541. Three classifications of geologic legend. Color stratigraphic 

 representation optional. 



