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  • The cartographic collection of the Doc Fisher Geoscience Library consists of the maps and air photos created or acquired by agency staff since the formation of BMR in 1946. This includes maps produced by agencies which have merged with these over the years, such as AUSLIG. Maps held include: Australian geological map series (1:250,000, 1:100,000 and the 1 mile series); topographic maps produced by NATMAP and its predecessors (1:250,000, 1:100,000 and 1:50,000) - latest editions only; various Australian geochemical, geophysical and other thematic maps; geoscience map series from other countries acquired on an exchange basis, including some with accompanying explanatory notes; Non-series maps acquired by donation or exchange; atlases. The Air photos are predominantly those used for mapping Australia and, to a lesser extent, Papua New Guinea and Antarctica, by BMR/AGSO from the 1940s to the 1980s. Geographical coverage of the sets is not complete, but many individual photos are unique in that they have pin points, overlays or other markings made by teams in the field. The Papua New Guinea photographs in the collection may, in many cases, be the only existing copies. Flight diagrams are also held for many (but not all) sets of air photos. Some other related materials, such as montages of aerial photographs (orthophotos), are also represented in the collection.

  • No abstract available

  • The Silurian to Early Devonian extensional history of the eastern Lachlan Fold Belt is well established with respect to the Hill End and Cowra Troughs. A rifting episode of similar age is described here for an area to the west of these more widely known troughs. The Jemalong Trough is a north-south trending belt, over 400 km long and between 15 km and 70 km wide, extending from near Junee in the south, to east of Nyngan in the north (Fig. 1). Much of the trough is poorly exposed, and substantial parts of it are interpreted from regional geophysics. The northern third of the trough is overlain by Mesozoic sedimentary rocks of the Surat Basin. The Jemalong Trough contains sedimentary and volcanic rocks of the Derriwong, Ootha, and Trundle Groups, and corresponds in part with the Bogan Gate Terrace of Scheibner and Basden (1998). The term 'trough' is used here, however, as the sedimentary rocks of the Jemalong Trough contain evidence for deep water as well as shallow water depositional environments, and the character of the volcanic rocks in the trough suggest substantial rifting of the underlying Ordovician volcanic basement. The trough lies unconformably on the intermediate to mafic Ordovician arc volcanics of the Junee-Narromine Belt and folded quartz-rich turbidites of the Girilambone Group and Kirribilli Formation. The southernmost margins of the trough are formed by part of the Gilmore Fault Zone, but, where exposed, unconformable margins are preserved for most of the length of the trough.

  • Mapping of solid geology on Mt Keith 3043 1:100 000 map sheet in the Eastern Goldfields, Western Australia, undertaken 1998 by A.J.Stewart as part of the National Geoscience Mapping Accord (NGMA). Briefly, mapping consists of geological boundaries/units, faults, folds, veins, dykes, joints, linears, marker beds, trends, structural measurements, drill holes and mineral deposits.