Sierra Ballena Shear Zone

Sierra Ballena Shear Zone or SBSZ is a sinistral strike-slip shear zone running across the Uruguayan Shield in eastern Uruguay and the Brazilian state of Rio Grande do Sul.[2][3] The system was last active in the Precambrian.[2]

Shear zones and terranes in Uruguay after Gaucher et al.., 2008.[1] Sierra Ballena Shear Zone is marked as "SBSZ". To the west Sarandí del Yí Shear Zone is marked as "SYSZ".

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