140 Transactions. 
EARLIER WORK. 
It is exceedingly doubtful if members of the early Geological Survey 
who mapped the area now described visited any but its marginal portions, 
CEOLOGICAL SKETCH-MAP OF 
- RIVERHEAD-KAUKAPAKAPA DISTRICT 
—_ Scale of Miles 
1 2 
rom 
F.A P» 
Roads ls 1 ly fro 
Defence Department map. 
a Stream. 
ACT To Silverdale 
A emetery 
Cabo 
x SS 
NAGS Le 
N jus stre 8% 
o> eS 
KTERO» р 
MA 
7 e 
—\ 
1-3: — 
ZNT. м 
SSW Fe 
IN 22) 
192 У 
a 
AE ory 
EMRE EE BOER a iy p MES 
MS mde erLes. ANgillace niic Ia йш, = 
ЕЗ Waitemata Series: Sancdstones with minor m 
udstone 
locally i tant conglomerate. 
ШШЩ Andesitic Conglomerates: Heey euren E 
5 es breccias. Б = 
LS | UltrabasicIntrusions : Mainly serpentine. 
[2X] Intrusive Semt-bastclgneous Rocks. 
Sa X. > ву, 7 RR A": ЖУ ЛЕТ 
the main road northwards from Kaukapakapa, and reported on the geology 
of that part of the present area which lies between Kaukapakapa and the 
mouth of Makarau Stream. McKay later (1884, 1888) visited a number 
of intrusions of serpentine in the vicinity of Silverdale (Wade), and recorded 
this fact along with some extraordinary observations upon the rocks and 
their stratigraphic relationships. Some cursory remarks by Hector (1881) 
