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
Nnt
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
Nae
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-wcae
159.6
162.8
Nak
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-wcak
162.8
178.55
Nae
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-wcae
178.55
185.9
Nak
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-wcak
185.9
285.55
Nae
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-wcae
285.55
294.55
Nak
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-wcak
294.55
305.2
Nae
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-wcae