THEMIS: Tectonic scars in Sirenum Fossae

Graben in Sirenum Fossae (THEMIS_IOTD_20190114)THEMIS Image of the Day, January 4, 2019. The linear features in this VIS image are graben called Sirenum Fossae. Graben are formed when blocks of material move downward between parallel faults.

The faults were created by tectonic stresses in this region. The ground is pulling apart and breaks into faults, continued stress moves the sides of the faults further apart and form the graben.

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