209 
(b) Features of Fluvial origin 
(i) Main drainage lines 
(ii) Trends of surface drainage/drainagevprovinces 
(iii) Alluvial fans 
(iv) Fluvial sands and gravels 
(v) Reg gravel overlying fluvial sands/gravels 
(c) Features of aeolian action 
(i) Longitudinal dunes 
(d) Features of marine origin 
(i) Coral reef 
(ii) Supratidal sabkha 
(iii) Lagoonal silts 
(iv) Former reef face 
(v) Coralline surface 
(vi) Former sabka 
(vii) Beach sands modified by aeolian action 
Soil Units Data was collected on the soils physical setting, depth, 
horizonation, colour, texture, structure, etc. These data were 
interpreted in the field and soils were classified according to the 
USDA Soil Taxonomy System (Soil Survey Staff 1975). The following 
soil types were identified. 
(a) Marine deposits. 
(i) Solorthids 
(ii) Calciorthids - Gypsiorthids 
(iii) Torripsamments - Gypsiorthids 
(iv) Torriorthents 
(v) Torriorthents - Torrifluvents - Calciorthids 
(b) Fluvial deposits 
(i) Torriorthents - Torrifluvents 
(ii) Torripsamments - Torriorthents 
(iii) Torriorthents - Camborthids 
(iv) Torriorthents 
(v) Torrifluvents - Camborthids 
(vi) Camborthids - Torrifluvents - Torriorthents 
Vegetation Units Vegetation was described by listing the various 
species, encountered on random traverses through each field site, 
ranking their dominance and describing structure. This information was 
used then to establish the four character legend as follows: 
Name of dominant taxa characterising the site 
General physiognomic description of vegetation 
Associated species used to establish legend unit 
Physiographic features of habitat. 
(i) 
Title 
(ii) 
Structure 
(iii) 
Associates 
(iv) 
Location 
Land Use The 
(USGS, 
1977) was