0
24
TQ
CLAY (UNDIFF. ORIGIN)
SAND
Soil and clay over fine-med. gr. sandy clay, basal laterite
Strat Unit Name
Tertiary-Pleistocene rocks
Strat Unit Description
Undifferentiated Tertiary to Pleistocene rocks.
GIS Code
aI
24
64
Nhu2
SILTSTONE
SAND
Med.-coarse gr. sandy siltstone over siltstone
Strat Unit Name
Umberatana Group unit 2
Strat Unit Description
Undifferentiated Upalinna and Yerelina Subgroups; includes the superseded Willochra Subgroup.
GIS Code
N-hu----02
64
177.53
Nhunt
SILTSTONE
DOLOMITE ROCK
Dolomite-siltstone breccia over finely laminated siltstone and massive dolomite
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
177.53
179.8
Nxcak
CONGLOMERATE
Conglomerate with subrounded-subang. clasts of basic volcanic
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-xcak
179.8
195.95
Nxcae
MAFIC EXTRUSIVE
Fine gr. basic volcanic with plag, illmenite or magnetite, pyroxene
Strat Unit Name
Beda Basalt
Strat Unit Description
Basalt, amygdaloidal to massive, tholeiitic, subaerial, flows 1-30m thick, altered by chlorite, sericite, hematite, amphibole, epidote and K-feldspar.
GIS Code
N-xcae