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Victoria University Antarctic Research Expedition Science and Logistics Reports 1977-78: VUWAE 22

C. Beacon Studies

C. Beacon Studies

At Finger Mountain the Maya Erosion Surface proved to have steep local relief in excess of 56 meters. The Metschel Tillite comprises of fluvial and fluvioglacial sandstones, conglomerates and a thin sandy diamictite, infilling the Maya Erosion Surface fossil scarp. Paleocurrent data indicates an east-northeasterly transport direction.

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In the Kennar Valley the Maya Erosion Surface also has considerable relief. The mantling Metschel Tillite has undergone soft sediment deformation and exhibits large scale (including overturned) folds and both steep and horizontal thrusts. Facies of the Metschel Tillite include laminated mudstones and siltstones, silty sandstones interbedded with thin diamictites (flow tills), quartzite sandstones and massive diamictices.

The basal Weller Coal Measures overlie the Metschel with a local angular unconformity. These coal measures contain quartzo-feldspathic medium to very coarse sandstones with carbonaceous streaks, fissile carbonaceous shales and 3 thin (less than 1 meter thick) coal seams, laterally persistent over 200 meters.

Two small outcrops of well stratified Metschel Tillite out-wash sediments were located near the head of Beacon Valley at the base of the northeastern spur of Mount Feather.