No description available.

This study investigates the sedimenology and geochemistry of Permian glacial sediments cropping out in the Bacchus Marsh and Derrinal areas in central Victoria and in the subsurface beneath the Cainozoic Murray Basin in Victoria, New South Wales and South Australia. Facies analysis of the Bacchus Marsh Formation, based on a critical review of literature on glacial sedimentary processes and environments, identifies the following major facies groups: 1. Subglacial tillites deposited beneath wet-based ice. Some of these tillites exhibit structures indicative of a number of subglacial processes such as frictional lodgement of large clasts, subglacial bed deformation, subglacial meltwater flow and subglacial size sorting of clasts. Other subglacial tillites are essentially structureless. 2. Bedded diamictites to sandstones deposited predominantly by ice-rafting of debris into standing water. 3. Fluvial outwash sandstone and conglomorate facies that are finer-grained than typical proglacial outwash facies. 4. Deltas and subaqueous outwash fans vary from sandy sediments deposited by proglacial and subglacial streams to coarse, poorly sorted complexes deposited as debris aprons close to the ice front. Abundant underflow deposits suggest that less than normal marine salinities prevailed in these water bodies, even if they were arms of the sea. 5. Supraglacial tillites consisting of sandy diamictites to pebble conglomerates.

Call number: LD2668 .T4 1952 P35 / Master of Science

Call number: LD2668 .T4 1986 B57 / Master of Science / Geology

No description available.

Outcrops of the Abo Formation (Wolfcampian to early Leonardian age) in the Sacramento Mountains of south-central New Mexico record the evolution of a dry alluvial fan system as it was deposited off of the Pedernal Uplift into the Orogrande Basin. A mud-rich, upward-fining basin-fill sequence characterized by stratigraphic thickness variations of as much as 450 m (1480 ft) and contacts that range from conformable to unconformable relationships is observed in the outcrop area. Five distinctive lithologic intervals are delineated in the Sacramento Mountains, three of which are studied in detail. These three units are informally designated the lower, middle, and upper Abo intervals and are all fluvial in origin. The remaining two intervals, the Lee Ranch Tongue of the Abo Formation and the Pendejo Tongue of the Hueco Limestone, are marginal marine in origin and are restricted to the southern portion of the range. Two types of lithofacies are present in the lower, middle, and upper Abo intervals. Matrix facies represent fine-grained overbank sediments, whereas framework facies represent coarser streamflow and sheetflow deposits. Lower Abo framework facies consist of middle-fan to fan-fringe stream-channel, braided stream, and sheetflood deposits which are arranged in one or more stacked, assymetrical, upward-fining megasequences 10-50 m (33-165 ft) in thickness. Middle and upper Abo framework facies were deposited basinward of the fans and represent deposits of incised, low to moderate sinuosity ephemeral streams and associated overbank splays. Middle Abo streams exhibited an anastomosed channel pattern whereas upper Abo channels were characterized by a distributive pattern. Pedogenic and sedimentologic evidence suggests that Abo deposition was strongly influenced by a long term, semi-arid to arid climate. Lateral and vertical facies relationships indicate that the five Abo intervals were part of a northeast to southwest transverse facies tract consisting of 1) proximal alluvial fans, 2) medial anastomosed streams, and 3) distal low-gradient mud-dominated floodbasins characterized by either distributary streams or tidal flats with associated marine carbonates. The overall Abo basin-fill sequence reflects the migration of the facies tract in response to the final stages of tectonic activity and the eventual quiescence and long-term erosion, retreat (pedimentation), and onlap of the Pedernal Uplift. / text

No description available.

No description available.

No description available.

Includes bibliographical references. / 122, [68] leaves, [7] leaves of plates : ill. (chiefly col.), maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The aims of this thesis are to determine the provenance of the Permian sands of southern Australia, to correlate the provenance of the Permian sands with the known geology and tectonics of East Antarctica and to determine those features of light and heavy minerals that are most useful as provenance indicators. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1996