Territory Stories

Report on the Land Units of the Coastal Plains



Report on the Land Units of the Coastal Plains

Other title

Soils of the coastal plains, Northern Territory, Australia.


Land Conservation Section


E-Publications; E-Books; PublicationNT




Coastal Plains of the Northern Territory.; Soils report


These reports describes the land resource mapping over the Northern Territory coastal plains region. The surveyed area was mapped at a scale of 1:50,000. The mapped land units are described using the dominate soils, topography and vegetation. The potential land use and limitations for each land unit are also briefly described.


There are three different reports attached to this record: Report on the land units of the coastal plains / K.J.Day; Soils of the coastal plains, Northern Territory, Australia / A.D.L. Hooper; and Soils report (coastal plains survey 1968,69,70 / K.J. Day




Coastal ecology - Northern Territory; Land Unit mapping; Coastal Plains

Publisher name

Animal Industry and Agriculture Branch, Northern Territory Administration

Place of publication

Darwin, N. T.


3 volumes, various pagings.

File type




Copyright owner

Animal Industry and Agriculture Branch, Northern Territory Administration



Parent handle


Citation address


Related items

https://hdl.handle.net/10070/506884; https://hdl.handle.net/10070/506885

Page content

4. Ey, Er and Eg layers are closely associated with 0.5 to 1.5% total salt contents where they underly Ag or Ad layers. Chlorides in this instance are mostly less than 50% of the total salts (0. to 0.5%) and reaction is 5.0-6.0. Ground water in the E layers is saline. Eb layers contain water with 1.5%-2.0% total salts and 0.9 to 1. chlorides, reaction is 7.0-7.5. Permeability of the layer is low (K = 0.16 to 0.70 ft/day). In Er layers ground water ranges between 0.5% and 1.5%, total salt contents and chlorides between 0.04% and 0.6%, reaction is between 3.0 and 6.0. (iii) G - Gleyed saline clay layer. These deposits are greenish- or bluish-grey in colour, wet and hig~y plastic. They invariably underlie Eb layers, often to depths of 50 feet (Watson 1966) but form the surface layers in soils of the Littoral land system. Shell layers with sub fossil marine molluscs are common and extensive lenses of clays with high amounts of wood fragments tentatively identified as Mangrove occur also. These peaty layers have a characteristic strong smell of sulphides. Three sub types are defined: G clays with no special features Gc cracking or flocculated surface clays in periodically dry areas Gp mangrove peat present This layer is saline with 0. to l.~fo total salts, 0.3 to 0. chlorides and reaction of 7.5-8.5. Ground water is invariably between 2. and 6. total salt content of which chlorides form at least 75~& of the total. Permeability is very low (K = 0.01 ft/day). (iv) F - Swamp derived peaty clays on the inland margins of the plains typical of freshwater environments. These are black or brown but with more reddish hues (lOYR)