46 
PACIFIC SCIENCE, Vol. XXII, January 1968 
Fig. 1. Map showing sampling stations. 
are several vestigial cinder cones on the island. 
The bay ice does not renew itself perennially. 
For this reason the U. S. Naval Air Facility was 
located at Hut Point, where heavy aircraft 
could land on the bay ice the year around. The 
sample from this location was collected in 46 
m of water two days after the icebreakers 
"Glacier” and "Northwind” removed bay ice 
of 5-m thickness. 
Cape Hallett : (72°18 / S, 170°20'E). The 
cape headland (elevation ca. 1,500 m) con- 
sists of beds of lava and tuff cut by many 
dikes and occasionally faulted. It forms the 
east side of Hallett Inlet, which is 8 nautical 
miles long. The west side consists of Precam- 
brian metasedimentaries which are only slightly 
metamorphosed and cut by intrusives. From 
this side Mt. Sabine rises sheerly to an eleva- 
tion of 3,617 m. The mouth of the inlet is dis- 
tinguished by a flat, triangular, raised beach 
beneath the cape headland. Hallett Beach serves 
seasonally as a rookery for an estimated 205,000 
penguins (Carl Eklund, Scientific Adviser for 
the U. S. Department of Defense, personal 
communication). It is here that the U. S.-New 
Zealand Scientific Base is located. In 1956 bay 
ice was moving out of the inlet on the eleventh 
of February. In 1957, breakup of the bay ice 
occurred a month earlier, due no doubt to ice- 
breaker preparation of a staging area at the 
entrance. On January 5, 1957 bay ice exceeded 
3 m in depth throughout the length of the inlet. 
Dependability of the bay ice for aircraft opera- 
tions most of the year was an important factor 
in its selection as a base site. The sample con- 
sidered herein was collected near the mouth of 
the inlet in 200 m of water. 
Robertson Bay: This is an embayment 20 
miles long at Cape Adare (71°21'S, 170°00 / E). 
The environment has been described by Priestly 
(1923). In brief, it resembles McMurdo Sound 
and Hallett Inlet geomorphologically, in that 
it was formed by a fault. The east side is of 
Tertiary origin and the west of earlier origin. 
