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Many faults are mapped as individual segments across an area. These fault segments are given a different value for name, number, code, or dip direction and so in the GIS database each segment occurs as its own unique entity. For example, the San Andreas Fault has several fault segments, from letters a to h, and fault segment 1h has segments with age of last fault movement from historic (<150 years) to late Quaternary (<13,000 years), with dip direction from vertical to unspecified, and fault type from exposed to concealed.