0
4
Qhr
CLAY (UNDIFF. ORIGIN)
GRAVEL
Red/brown clay & quartzite gravel.
Strat Unit Name
Holocene regolith/colluvial sediments
Strat Unit Description
Undifferentiated Holocene colluvial/regolith sediments.
GIS Code
H---r
4
52
Nhwsts
QUARTZITE
SANDSTONE
Interbedded quartzite, white, fine grained, sandstone, white, lesser siltstone & green shale.
Strat Unit Name
Simmens Quartzite Member
Strat Unit Description
Quartzite, blocky; sandstone, cream.
GIS Code
N-hwsts
52
84
Nhwstc
SANDSTONE
QUARTZITE
Sandstone & quartzite, fine grained, red/brown, micaceous, with bands of siltstone & shale.
Strat Unit Name
Corraberra Sandstone Member
Strat Unit Description
Sandstone, red, purple, slumped, silty. Some shale.
GIS Code
N-hwstc
84
250
Nhwstt
SILTSTONE
SHALE
Siltstone, chocolate brown, micaceous, finely bedded, with blue/green shale interbeds, common fine sandstone interbeds above 110m.
Strat Unit Name
Tregolana Shale Member
Strat Unit Description
Shale, red and green; siltstone.
GIS Code
N-hwstt
250
258
Nhwsn
DOLOMITE ROCK
SILTSTONE
Silty dolomite, buff, interbedded thin siltstone & shale.
Strat Unit Name
Nuccaleena Formation
Strat Unit Description
Dolomite, thin, laminated, micritic, with interbedded shale near the top.
GIS Code
N-hwsn
258
401.1
Nhueh
SANDSTONE
Sandstone, red/brown-grey, poorly bedded to massive, friable, well rounded quartz, very minor felspar & lithic fragments including GRV & Pandurra.
Strat Unit Name
Whyalla Sandstone
Strat Unit Description
Sandstone, coarse-grained, bimodal, with large-scale crossbedding, sand grains very well rounded, spherical.
GIS Code
N-hueh
401.1
434.65
Nhunt
SHALE
DOLOMITE ROCK
Shale, black, finely laminated, pyritic, with thin bands to 20mm of dolomite & sandy dolomite, few mudstone & siltstone layers, minor chalcocite & bornite at top & base.
Strat Unit Name
Tapley Hill Formation
Strat Unit Description
Siltstone, grey to black, dolomitic and pyritic grading upwards to calcareous, thinly laminated, locally cross-bedded; dolomite, grey, flaggy to massive; limestone conglomerate, intraformational; greywacke.
GIS Code
N-hunt
434.65
446.3
M-p
SANDSTONE
SHALE
Sandstone, purple/brown, coarse grained, angular, few bands of green &chocolate shale, minor conglomerate towards top.
Strat Unit Name
Pandurra Formation
Strat Unit Description
Sandstone, quartz and lithic, m.g.-c.g., poorly sorted; sandstone, well-sorted, v.f.g.-m.g.; conglomerate, granule to pebble; mudstone; siltstone. Red, brown or purple with reduction spotting or mottling. Fluvial, large-scale cross-bedding and liesegang banding. Maximum deposition 1424±51 Ma (Rb-Sr).
GIS Code
M----p