The signature of neotectonic activity recorded as conjugate normal faults in Late Pleistocene-Holocene unconsolidated sediments was discovered during geomorphic and structural field studies in the Primorsky Fault zone, a major rifted structure in the Baikal region. The local stress field reconstructed from traces of microfaulting corresponds to northeastern extension. A section across an archeological site showed evidence of stony ejecta related in space and time to the Sarma earthquake that occurred at the Pleistocene-Holocene boundary. A new approach has been proposed for estimating the degree of crustal breakage, which made a basis for the respective mapping of the Primorsky Fault zone.
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