Isla Partida Norte, in the north-central part of the Gulf of California (Sea of Cortez), is a volcanic island. Much of it is columnar basalt; as the lava hardened into basalt, it fractured into long columns, which I believe tended to be parallel with the direction of flow of the lava. We did not land on the island; we just cruised around it in zodiacs.
There was quite a bit of guano on the rocks.
Return to Table of Contents
Copyright © 2005, Edwin E. Moise. Revised July 14, 2005.