0
40
TQ
CLAY (UNDIFF. ORIGIN)
SAND
Calcrete over fine-med. gr. subrounded sandy clay
Strat Unit Name
Tertiary-Pleistocene rocks
Strat Unit Description
Undifferentiated Tertiary to Pleistocene rocks.
GIS Code
aI
40
155.23
Nnt
SILTSTONE
DOLOMITE ROCK
Siltstone with dolomite laminae
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
155.23
156.8
Nak
CONGLOMERATE
BRECCIA (UNDIFF. ORIGIN)
Breccia and conglomerate of ang.-rounded craton and wacke clasts
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-wcak
156.8
179.9
N
SANDSTONE
Vaguely layered to massive fine-med. gr. sandstone with some cross bedding
Strat Unit Name
Neoproterozoic rocks
Strat Unit Description
Undifferentiated Neoproterozoic rocks.
GIS Code
N-
179.9
181.8
Nae
SILTSTONE
MAFIC EXTRUSIVE
Med. gr. basic volcanic
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-wcae
181.8
194.1
Nak
SILTSTONE
CONGLOMERATE
Pale maroon CGLM containing well rounded pebbles of B.I.F. (50%), SDST (30%) and silt down to 183 m, overlying pale maroon and buff shaley and sandy SLST
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-wcak