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The natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui.
A satellite image of Wai'o Bay, south Maui, showing the location of the natural arch a Pokowai Gulch (including my camera location for the following shots of the natural arch).
The natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui.
A natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui. The steeply-dipping slopes of black basalt are the tops of old lava flows that ran down to the waters' edge and continued out into the bay, instantly cooling and hardening into the modern shoreline. Although basalt is one of the hardest rock types in existence, its high iron content causes it to oxidize (rust) when exposed to the air and waves; it almost immediately begins to disintegrate, easily forming caves and arches in the rock mass.
A natural arch carved in a basalt cliff, near Kuaiwa Point at Waianapanapa State Park, east Maui.
The natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui.
The natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui.
The natural arch cut into a knife-edged basalt promontory at Pakowai, near the Pi'ilani Highway, south Maui.
See photo in original gallery.
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