0
40
TQ
SAND
CLAY (UNDIFF. ORIGIN)
Sandy clay, fine-coarse gr. sand
Strat Unit Name
Tertiary-Pleistocene rocks
Strat Unit Description
Undifferentiated Tertiary to Pleistocene rocks.
GIS Code
aI
40
159.1
Nhunt
SHALE
DOLOMITE ROCK
Brown and grey shale over siltstone and 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
159.1
159.6
Nxcae
BASALT
Grey altered pyritised volcanic or conglomerate of 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-xcae
159.6
162.8
Nxcak
CONGLOMERATE
Conglomerate of basalt pebbles and boulders
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-xcak
162.8
178.55
Nxcae
BASALT
Amygular basalt
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
178.55
185.9
Nxcak
SANDSTONE
MUDSTONE
Conglomeratic sandstone above grey mudstone with sandstone layers.
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-xcak
185.9
285.55
Nxcae
BASALT
SANDSTONE
Amygdalar basalt divisible into a number of flows, minor sandstone.
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
285.55
294.55
Nxcak
SANDSTONE
CONGLOMERATE
Sandstone conglomerate with minor brown shale.
Strat Unit Name
Backy Point Formation
Strat Unit Description
Sandstone; conglomerate, pink to red, locally haematitic.
GIS Code
N-xcak
294.55
305.2
Nxcae
BASALT
SANDSTONE
Amygdalar basalt flows with minor sandstone beds.
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