Small Talk

Kailua Ahupua'a Geology Tour

September 27th, 2015

Do you want to know how the Ko‘olau eruptive center was formed two million years ago? Sign up now for a popular Kailua Ahupua’a Geology Tour that includes Kawainui Marsh.

On Saturday, October 3rd from 8:30 am to 12:30 pm., Dr. Floyd McCoy, geology professor from the Windward Community College, will take a tour group to the Pali Lookout, AMERON quarry and Na Pohaku of Hauwahine, by Kawainui Marsh. He will talk about the Ko‘olau eruptive center and how the catastrophic collapse of the windward side of the shield volcano occurred. He'll show the group dike formations and the quarrying operations by AMERON.

Dr. McCoy will then look at Na Pohaku o Hauwahine and explain the geological features of Kawainui . Bring your cameras, sun screen, wear outdoor gear and walking shoes. The group will car pool between sites.

The tour is co-sponsored by Ahahui Malama i ka Lokahi, and AMERON. Donations of $10 will be accepted. There will be a limit of 30 persons and you must make reservations by calling Ka`imi Rick Scudder at (808) 263-8008 or

One Response to “Kailua Ahupua'a Geology Tour”

  1. locomoco:

    That'd be an interesting tour. Don't forget to mention that one of Hawaii's rare collectible mineral specimens are the geodes that formed in lava pukas as a result of hydrothermal alteration within the caldera boundaries. Good luck finding one these days! It took me three years of searching back in the 70s. I have to say I'm not totally convinced that the Windward caldera suffered a catastrophic edifice failure though. The usual evidence is the undersea rock "slides" that extend long distances to the northeast of the Windward side. But the pitch of the ocean floor is far too shallow to allow simple rockslides to extend as far as these do. My conclusion, there must have been some other transport mechanism and it wouldn't have been pyroclastic flows/lahars either.

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