Norfolk Island
Located at 29S, 168E
Sitting atop the Norfolk Ridge which runs from New Zealand
to New Caledonia.
The island is composed primarily of basaltic lavas, with interbedded
tuffs.
Regarded as a product of intraplate volcanism since it does
not appear to be associated with a plate boundary.
The lavas have been dated as between 2.4 to 3.2 Ma ago (Late
Pliocene).
The island measures 8 x 5 km and reaches an altitude of 315m
above sea level.
The philatelic first day cover below was mailed June 10th,
1947
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