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Traditional methods of monitoring brush canopies such as ground survey and aerial photography are not cost effective for large areas. This experiment compared pboto-estimakd brush canopy closure to Landsat MSS derived vegetation indices. Several vegetation indices were found to be highly correlated to brush canopy cover. The vegetation index which was most highly correlated with brush canopy cover was the GB ratio (Kautb and Thomas Greenness/Kauth and Thomas Brightness, r=O.813). These results suggest that brush canopy cover can be quantified through the use of the Landsat MSS data; however, further research is necessary to determine the transportability between sites of green biomass/brush canopy quantification indices.

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Synopsis Fossil Lithothamnium (calcareous algae) rhodoliths occurring in early Flandrian raised coastal deposits near Irvine, Ayrshire, are described, and their growth characteristics are analysed. The analysis indicates that much of the Lithothamnium was derived, probably from several nearby localities within the early Flandrian bay. Comparison of the Lithothamnium -bearing and associated sediments with sedimentary facies models developed from the study of modern Lithothamnium by Bosence ( Geol. J., 15 , 91–111; 1980) provides discussion regarding the palaeoenvironmental conditions at this locality during early Flandrian times.

A field test of the depressuring process used to remobil ize and produce trapped gas from a watered-out reservoir is described.Actual performance is compared with predictions at two different points in time showing the modifications to the reservoir-aquifer simulation model that were required to obtain pressure matches.Increased water production rates, justified by the improved simulation model, led to the product ion of secondary recovery gas and, in turn, to the conclusion that the depressuring process is working.