134 
PACIFIC SCIENCE, Vol. XXI, January 1967 
TABLE 1 
Stratigraphic Units of the Tophouse District 
SERIES 
AND AGE 
FORMATION 
MAP 
SYMBOL 
LITHOLOGY 
MAXIMUM 
THICKNESS 
IN FEET* 
s 
mountain scree 
Wairau surface 
H 
gravels, 10-ft terrace 
100? 
Holocene 
Tophouse surface 
T 
fluvial gravels, silts, 
300? 
200-ft terrace 
Tm 
glacial moraine 
200? 
Major Unconformity 
Tertiary 
t 
terrestrial sediments 
600? 
Major Unconformity 
Stevens formation 
YSa 
tuffaceous siltstone 
(5,000 ft thick) 
YSb 
tuffaceous sandstone 
11,000 
(6,000 ft thick) 
Maitai 
Waiua formation 
Yw 
green and purple banded 
Series, 
mudstone and sandstone 
2,500 
Upper 
Greville formation 
YG 
grey banded argillite 
9,000 
Permian 
Rangitoto formation 
YRA. 
white limestone 
(?) 
(2,000 ft thick) 
YR 
grey calcareous sandstone 
3,800 
(1,800 ft thick) 
Cessation of Igneous Activity 
Es 
spilite, dolerite 
4,000 
(extensively haematized) 
EB 
haematized red and green 
volcanic breccia 
1,000 
Te Anau 
Series, 
Stratigraphic Relationship Uncertain 
Basal 
Permian 
E|3 
serpentinite 
2,000 
Ey 
dunite, harzburgite, 
pyroxene peridotite 
7,000 
Wairau 
Eys 
peridotite and 
ultramafic 
peridotite scree 
mass 
E8 
serpentine containing 
500 
hydrogrossular 
Ee 
amphibolite, rodingite 
5,000? 
Rocks West of the Waimea Fault 
Te Anau 
Brook Street 
B 
keratophyre, andesite, 
Series, 
volcanics 
volcanic agglomerate, 
12,000 
Carbonif- 
spilite 
erous (?) 
Rocks Southeast of the Wairau Fault 
R 
Mount Robert group- 
p 
Triassic 
Alpine facies 
greywacke, argillite 
W 
Raglan group- 
p 
greywacke, argillite 
As measured across outcrops in the Tophouse district. 
