A proposed new city referred to as Murray New Town, with a possible population of 250 000, is to be built in the Murray Bridge area, west of the Murray River. The city will-occupy an area of approximately 175 sq miles; (450 km2). This report has been prepared following a request from the State Planning Office to provide information on construction materials and building foundation conditions which will, influence the selection of a site for the new city. The work was undertaken at short notice as a matter of some urgency. The conclusions reached are based upon a study of recorded information, supported by information from Councils and by field reconnaissance. The Murray New Town area is on the western, margin of the Murray Basin and occupies an uplifted block of gently undulating plains country with altitudes ranging from 950 ft (290 m) to 25 ft (7.5 m) above sea level. The Murray River flows on a north-south course along the eastern side of the area near the town of Murray Bridge. The area is bounded to the north by Salt Creek and Long Gully, and to the west by the Bremer Fault Scarp. The Pallamana Fault Scarp and Murray River together form the eastern boundary. The southern boundary runs between Bremer and Camel Trig. Stations then swings south to within 2.5 miles (4 km) of Lake Alexandrina. The text is accompanied by a locality map of the area investigated showing the main geological features, by a detailed geological map showing the location of construction materials previously worked or investigated, and by a geological and topographical map relating to foundation conditions. The location and nature of materials previously worked or investigated is set out in some detail on tables of construction materials and these should be consulted in conjunction with the map showing their distribution.