They are the graphic representation of the types of contacts among the cartographic units. The black thin lines represents the sedimentary contacts, and in thick lines represents the mechanical contacts and the structures of folding. The blue lines represents the intrisive contacts are represented, and in red and green lines the limits of the metamorphic zones. The prompt symbols indicate the dip of the capes or other planar o linear structures.

Concordant contact 

Discordant contact

Transitional contact

Thrust
Reverse fault

Normal fault

Double movement faults

Syncline

Anticline

Fossilized structure

Intrusive contact
Limit of metamorphic zone

Dip direction and angle

Stratification dip

Schistosity
Intersection lineation