This dataset contains point, line and polygon topographic and cultural data for the Cocos (Keeling) Islands. Coverage is of Home and West Islands. To view a sample of the data showing the ArcView legend click here.

This dataset is a polygon theme of vegetation types or structures of the Cocos (Keeling) Islands. It is derived from topography data (possibly 1:1000 scale) created by AUSLIG. The attributes are probably meaningless. Re-coding according to actual vegetation types is recommended if this layer is to be used for analysis. The vegetation appears to match the 1987 orthophotography, and would therefore be out of date in some areas (the 1992 planning data documentation reveals that areas have been cleared since the 1987 air photos). Coverage is over West and Home Islands.

Trace Energy Services was contracted by the Australian National Seismic Imaging Resource (ANSIR) to conduct the WA seismic 2004 survey in the eastern & northern Goldfields region of Western Australia. Recording commenced on the 26th February 2004 on line 04PD-KB1 and was completed by the 27th April 2004 on line 04SI-CQ1. There was a two week shutdown for wet weather in early March. There were 148.59 km of 2D seismic reflection data recorded, 137.54 km over 29 traverses using Litton 315 Paystars and 11.05 km over 5 traverses using a single IVI Minivib as source. All lines were situated within the lease boundaries of gold mining companies, namely, Sons of Gwalia (Tarmoola & Gwalia), Placer Dome (Kanowna Belle, Wallaby, Granny Smith, Lancefield & Mt Morgans), Anglo Gold (Sunrise Dam) and Goldfields (St Ives at Kambalda), Figure 1.

We examine surface sediment and water column total nutrient and chlorophyll a concentrations for 12 estuaries with average water depths <4 m, and calculated sediment loads ranging from 0.2 to 10.8 kg m-2 year-1. Sediment total nitrogen, phosphorus and organic carbon concentrations vary inversely with sediment loads due to: (i) the influx of more mineral-rich sediment into the estuaries; and (ii) increasing sediment sulfidation. Sediment total organic carbon (TOC) : total sulfur (TS) and TS : Fe(II) ratios correlated to sediment loads because enhanced sedimentation increases burial, hence the importance of sulfate reduction in organic matter degradation. Curvilinear relationships were found between a weathering index and organic matter 13C in sediment, and sediment load. The rising phase of the curve (increasing weathering, lighter isotopic values) at low to intermediate loads relates to soil erosion, whereas regolith or bedrock erosion probably explains the declining phase of the curve (decreasing weathering, heavier isotopic values) at higher sediment loads. The pattern of change for water column total nutrients (nitrogen and phosphorus) with sediment loads is similar to that of the weathering index. Most water quality problems occur in association with soil erosion, and at sediment loads that are intermediate for the estuaries studied. Limited evidence is presented that flushing can moderate the impact of sediment loads upon the estuaries.

The FreeGs is a web-enabled thermodynamic database of geologically related substances.

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data