GL51

Location: Mount Richmond

Australian Soil Classification: Calcareous, Petrocalcic, Orthic TENOSOL (confidence level 4)
General Landscape Description: Undulating rises
Site Description: Upper slope off Dune
Land Unit: Nelson Dunes and Plains
Geology: Quaternary limestone

General Land Unit Description: This land unit occurs in the south western corner of the region. The land unit is generally composed of siliceous sand dunes and plains over calcareous material. The partly consolidated calcareous deposits were formed in an arcuate band (north west / south east trending) formed by the retreat of the Murray Sea. The siliceous dune and sand sheet material is generally of aeolian origin. Although there is a large area of this land unit in the south west of the study area there are also some isolated patches, mainly mixed amongst the Follet land unit that could not be mapped due to restrictions of scale.

The sand varies from orange (GL48), to red (GL39) to a paler colour, represented by this soil type. The orange and red sands are usually associated with the calcareous material, whereas the paler sands tend to have less carbonate (e.g. GL51, GL38) or the calcareous material is greater than 2 metres deep (e.g. GL50). Another soil variant occurs on the swales in between the dunes. This soil tends to have a heavier textured subsoil which may or may not have calcareous material underneath.






Soil Profile Morphology

A1	0-20 cm	Dark brown (10YR3/2) sand, apedal single grained, pH 6.3; transition to:
Subsoil
B21	20-50 cm	Brown (10YR5/3) sand, apedal single grained, pH 6.7; transition to:
B22	50-80 cm	Strong brown (10YR4/6) sand, apedal single grained, pH 6.6; transition to:
B23	80-140 cm	Strong brown (10YR5/8) sand, apedal single grained, pH 7.0.
BC	140+ cm	Limestone

• Deep sandy profile
• Limestone at depth

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl2)	EC dS/m	Organic Carbon %	Total Nitrogen %	Exchangeable Acididty meq/100g	Exchangeable Cations				Coarse Sand (0.2-2.0 mm) %	Fine Sand (0.02-0.2 mm) %	Silt (0.002-0.02 mm) %	Clay (<0.002 mm) %	Field Capacity % w/w	Wilting Point % w/w
								Ca	Mg	K	Na
								meq/100g
A1	0-20	6.3	5.5	0.07	0.86	<0.05	3.8	3.4	0.41	0.12	0.09	75	13	1	12	4.1	1.5
B21	20-50	6.7	6.1	0.06			2.1	1.4	0.14	0.10	<0.05	74	15	1	10	2.7	1.0
B22	50-80	6.6	6.0	0.05			1.8	0.68	0.12	0.09	<0.05	74	23	2	2	3.6	1.0
B23	80-140	7.0	6.4	0.06			1.3	0.64	0.07	0.09	<0.05	77	20	2	1	8.8	0.7