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Open File Report 77

Explanatory notes for the Broken Hill and Curnamona province 1:500 000 regolith landform maps (includes two maps)

Gibson, D.L.

These notes are designed to accompany the Broken Hill and Curnamona Province 1:500 000 Regolith Landforms Maps first published as a hardcopy form by CRC LEME in 1995 and 1996, and subsequently revised (new polygon symbols and reference) and published in digital and hardcopy form in 1999. The Broken Hill region is well known for its mineral wealth, but geochernical exploration is hampered by poor bedrock outcrop in low relief, regolith dominated erosional terrains which surround the higher relief areas around Broken Hill and in the Flinders Ranges, and much of the region is occupied by thin basin sediments overlying prospective bedrock. The map is designed to show broad regolith-landform units, giving a valuable regional overview of the main regolith types and their associated landforms. This is of use to mineral explorers in the region wishing to place their tenements within the broad regional regolith-landform context, and also giving a general outline of the major areas of bedrock or regolith dominated terrain. It also highlights areas where further regolith investigations might be carried out.

These notes include ideas on the origin of features of the regolith and landscape in the area, an expanded description of the regolith landform units shown on the maps and a bibliography of relevant published material. Appendices include a table of new and old map symbols, and synopses of field observations made by the author in areas with little published information on regolith to the east and north of Broken Hill.

Last updated: Thursday, January 06, 2000 01:49 PM


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