Middle Jurassic turbidites of the Elgon Formation of the Ulban Terrane: sedimentological features and paleocurrent directions
The Ulban terrane composed of a thick sedimentary series of Jurassic clastic deposits is located at the junction of the Mongol-Okhotsk and Sikhote-Alin orogenic belts. The results of the study of the deposits assigned to the Middle Jurassic Elgon Formation are presented. The structure of the sedimentary succession and sedimentological features are considered and illustrated, which indicate sand-reach turbidite sedimentation in a setting of sandy lobe of turbidite cones or ramps. The paleocurrent directions measured in outcrops and calculated using the anisotropy of magnetic susceptibility suggest the transport of clastic material from the western or southwestern sources.