Friday, May 1, 2026

The Koko Crater and Koko Head Area: Part One

Every time I've climbed Diamond Head, I've stopped at the Kahala Lookout
just before the tunnel that takes you inside Diamond Head Crater.
Stretched out before me is a sight I never tire of seeing,
beautiful Maunalua Bay and the prominent peaks of Koko Crater and Koko Head.

Maunalua Bay, Koko Crater (left), and Koko Head (right)
Honolulu⁩, ⁨Oʻahu⁩, ⁨Hawaiʻi⁩, ⁨USA
March 19, 2025
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved

This year, thanks to our friends Kathy and Bruce, Terry and I finally visited
the scenic coastline wrapping around these striking volcanic features. 
From downtown Honolulu it's a drive of about 13 miles and takes 25-30 minutes, 
depending on traffic, via the H-1 Freeway East (Kalanianaole Highway) 
and continuing onto HI-72 South toward Hawaii Kai.

Terry, Kathy, and Bruce
‎⁨Koko Head District Park⁩, ⁨Honolulu⁩, ⁨Oʻahu⁩, ⁨Hawaiʻi⁩, ⁨USA
March 16, 2026
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved

Koko Crater (Kohelepelepe) reaches1,208 feet (368 meters) in height,
almost twice the height of Koko Head (Kuamo‘okāne) at 642 feet (196 meters).
These landmarks are part of a series of volcanic vents that erupted
through the seaward edge of the older, dormant Koʻolau Volcano.

Famous Volcanic Vents Along Southeastern Oʻahu⁩ 



The Koko Crater and Koko Head Area


We stopped first in Portlock at Koko Kai Mini Beach Park, otherwise known as China Walls.

Koko Kai Mini Beach Park
 Portlock, ⁨Oʻahu⁩, ⁨Hawaiʻi⁩, ⁨USA
March 16, 2026
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved

What a spectacular spot!  
At long last I was standing near the base of Koko Head,
the place I had gazed at many times from Diamond Head.
I walked to the end of the stone path, and there stood Diamond Head
4.5 to 5 miles (7.2–8 km) directly across Maunalua Bay. 

Diamond Head from China Walls on Koko Head
Koko Kai Mini Beach Park, ⁨Honolulu⁩, ⁨Oʻahu⁩, ⁨Hawaiʻi⁩, ⁨USA
March 16, 2026
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved


I did not scramble down to the flat-topped lava benches that form China Walls.
One look told me that it was a dangerous spot.  
An unexpected wave could sweep people into the ocean with no easy exit,
or smash them into jagged rocks beneath the water.
It reminded me of the dangerous rocks in my beloved Peggy's Cove in Nova Scotia.
People die every year at these places, because they don't understand the danger.  

Lava Benches at China Walls
Koko Kai Mini Beach Park, ⁨Honolulu⁩, ⁨Oʻahu⁩, ⁨Hawaiʻi⁩, ⁨USA
March 16, 2026
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved




A Warning to Pay Attention at China Walls

But, of course, this geologist was interested in the rocks!

You may know that the island of O'ahu⁩ was formed by two volcanoes over a hotspot in the Pacific Ocean.  As the Pacific Plate, the largest tectonic plate on Earth, moved over this stationary hotspot in the Pacific Ocean, a plume of magma from the mantle rose to the surface forming a series of shield volcanoes one after another.  It took around 70 million years for this process to create the Hawaiian Islands, and today the islands continue to move northwestward about 4 inches (7 to 10 centimeters) a year. 

The Hawaii hotspot and the inferred underlying mantle plume in cross-section

Oʻahu⁩ was created by the merging of two of these shield volcanoes,
massive, gently sloping volcanoes built from very fluid basaltic lava flows:
the Waiʻanae Range to the west and the Koʻolau Range to the east. 
Waiʻanae is the older of the two, emerging from the ocean 3.9 to-2.8 million-years ago.
Koʻolau volcano emerged prior to 2.9 million years ago.
You can see the remains of these volcanoes in the Waiʻanae and Koʻolau ranges.

Koʻolau Range 
‎⁨Kualoa Ranch⁩, Kaneohe⁩, ⁨Oʻahu⁩, ⁨⁨Hawaiʻi⁩, ⁨United States⁩
March 14, 2025
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved

The Koko Head area is much younger geologically,
forming about 30,000–35,000 years ago, long after Koʻolau Volcano went dormant.
When magma found new routes to the surface of Koʻolau Volcano,
a rejuvenation stage of volcanism occurred.

These secondary, explosive eruptions of the Koʻolau Range
created the Koko Head area volcanic tuff cones and craters,
some of the last volcanic activity on Oʻahu⁩.
The flat-topped lava benches at China Walls formed from 
basaltic lava flows during the rejuvenated volcanism. 

Next time, I'll share a little more about the places and geology of this storied coastline.

This mural celebrates China Walls and is a collaboration 
between Kamea Hadar, Melón James, Jeff Gress, and Gavin Murai, 
a local nonprofit Huli, and Kaiser High School students.  
China walls was historically known as Kawaihoa.
© M. Louise (MacBeath) Barbour/Fundy Blue. All Rights Reserved


Have a great weekend! 


 Till next time ~
 Fundy Blue
 
Standing Into Danger                                    https://selkiegrey4.blogspot.com
 Copyright ©2026 – All rights reserved.

My next post will be IWSG Day
Wednesday, May 6th. 🤞 

On the Bay of Fundy
© M. Louise (MacBeath) Barbour/Fundy Blue
All Rights Reserved



    

30 comments:

  1. A vivid snapshot of Oʻahu, where scenery and geology meet around Diamond Head and Koko Head.

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    1. Thanks, Roentare! Have a wonderful weekend, my friend!

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  2. ...Louise, I've never been to this area, so thanks for taking me along to see the sights. The Mural is a beauty!!!

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    1. I thought of you immediately when I saw this mural at China Walls, Tom. Tracking down who painted it took some detective work. I think muralists are wonderful artists. Happy Friday!

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  3. Fascinating, Louise! I knew none of this!

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    1. I'm so glad that I could share this with you, Debra. I first heard of "continental drift" in Geology 100 in the fall of 1968. It was still controversial. But I was hooked and switched my major to geology. The advancements in plate tectonics since those early continental drift days have explained so much that we didn't understand then. It's been a lifelong passion of mine. Have a great weekend!

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  4. Dear Louise, what an amazing place. Beautiful photos, dear friend. Thank you so much for sharing this lovely tour.

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    1. It is amazing, Linda! I never tire of learning more about it. I hope you have a lovely weekend!

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  5. Fascinating!
    I want to go to Hawaii and take you with me! (Terry can come too!) You would LOVE the monadnocks we have in this area, I want you to come here and I will meet you both there! So much rock for you to examine and tell me about! OH, and rogue wave....I experienced one at Myrtle Beach, South Carolina one time. I saw it coming, I was standing on the shoreline, just with my feet in the water. It completely went over my head and when I looked, ALL the people were under water! One by one, the floats started popping up and then, heads started appearing! No one was injured but it is something one never forgets! If that had been on rocks, I can't imagine how dangerous it would have been. (My sister washed up to my feet and she stood up with no bathing suit top! She never lets me forget that I couldn't speak, only motion to her top, which had slipped down to her waist. Don't call me in emergency. LOL).

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    1. I would LOVE to meet you, Kay, and I have enjoyed learning about your area through your eyes. I would LOVE to see your monadnocks which you have shared many times in your blog. Thanks for sharing your memories of a rogue wave. Luckily your experience ended well and is a little funny. Your poor sister. 😂 All's well that ends well! You and Richard have a lovely weekend!

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  6. Amazing how things bend and shift and what comes to be. Who knows what things will look like in another million years.

    As soon as you said it looked dangerous, I thought of the dumb dumbs at Peggy's Cove and that was your next thought too. People just don't think when it comes to some of these places.

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    1. Hey, Pat! How are you, my friend? I can feel some sympathy for people who don't live near the ocean and don't understand the dangers, but I feel very little for those who think the rules don't apply to them and do very stupid things. I'd love to see the world in a million years. One likely thing is that there will be a new Hawaiian island or two, maybe three. Right now a new underwater volcano is forming a seamount about 20 miles off the southeast side of the Big Island of Hawaii. It's called Kamaʻehuakanaloa (formerly Lōʻihi) and sits about 3,000 feet beneath the surface of the water. Don't you love Hawaiian words? I always have fun trying to say them. Have a great weekend!

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  7. Oh Louise this is an amazing trip. The views are simply amazing. I haven't been to Hawaii in many years and you show me how much I miss it. LOL Thank you for sharing with FFO and have a very nice weekend.

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    1. Thanks, Nicole! I had to include the mural face for you and Tom. I fought with this post all day yesterday, so when 10:00 pm came last night, I knew I wasn't going to get to images for each of you whom I link with. 😂. I understand how you feel about Hawaii. I've only been home since the 25th of March, and I miss it. Have a very nice weekend with Mr M!

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  8. Bravo!!!
    Thanks for today's post and link-up to AFFF#207

    MUCH LOVE

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  9. Hawaii is an amazing state, not just geographically speaking, but culturally as well. My wife and I were in Maui, and loved the natural sites, history, and people. Thanks for this wondrous post and happy FFO!

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    1. Happy Friday Face Off, Arnoldo! I'm glad that you and your wife experienced the beauty of Maui. It is a gorgeous island. I love all the Hawaiian islands, and I have a personal connection to Thomas Jaggar who founded the Hawaiian Volcano Observatory. His sister took my mother under her wing in Smith's Cove, Nova Scotia, when she was a young girl. Miss Jaggar convinced my Mom to go to university, the first person on her side of my family. Have a lovely weekend!

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  10. Replies
    1. Yes, wonderful Hawaii, Christine. Wishing you an awesome weekend!

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  11. That crater is pretty impressive. I love how you can see the whole crater. And it's amazing how many people are not smart when it comes natural situations. I remember all the signs about people dying when I visited Peggy's Cove last fall. People die here in New Hmapshire's White Mountains too frequently also. At this time of year they forget that there is snowing those mountains and they don't go prepared, get lost and then never make it out. I'll be looking forward to next week's geology lesson. hugs-Erika

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    1. Hugs back at you, Erika! Unfortunately, nature can be unforgiving wherever you live. Next week I have an IWSG post on Wednesday, so it will be the following week before I get to the next geology lesson. You can probably tell I love geology. 😂 I hope that you are enjoying a great spring weekend!

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  12. Hawaii was never particularly a state that called to me, that I really wanted to see. But since I've been following you on your trips there, that has changed. You show us so much beauty, culture and adventure that if I had the chance, I'd give it a go! You are an ambassador!

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    1. Thanks, Jeanie! That's a high complement, Ambassador Louise, because I deeply love Hawaii. I'm thrilled that I have added to your appreciation of this wonderful state. All the best to you!

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  13. The volcanoes in Hawai'i - both dormant and active - are incredible fascinating. I've seen Kīlauea's lava and been up to Haleakalā. We hiked out to see the lava flow near Kalapana. It's so amazing and never loses its fascination. Good thinking that you didn't go down to that beach - so many people underestimate the danger of these places. Our beaches here are also dangerous because of the sleeper waves (some call them sneaker waves) and their dangerous under currents. Every year people drown because they don't pay attention to the water. Your pictures really make me want to go back to Hawai'i and the avocado tree house where we used to stay.

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  14. Hawaii seems to be so interesting. Wonderful pics and an interesting story. Oh, there is a tunnel to the inside of the crater. How amazing. Literally you are living on vulcanos.
    Have a good time and thanks for your kind visit to my blog.
    Violetta

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    1. It's nice to see you, Violetta! Yes, there is a big tunnel at Diamond Head, because the crater wall is wide. It's fun to walk through, but cars and buses use it too. The mountains in Hawaii are very different from those in Austria. Enjoy your week!

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  15. Your post makes me want to go back. We were in that area...I have a similar picture taken from Diamond Head (my favorite part of that hike - or should I say, shuffle, since I was in a long line of people, was the Dole Whip when I got back down! It was a hot hike and the cool treat was especially tasty! But, I realize just how much I missed seeing your post.

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  16. My dear friend Louise!
    It’s nice to know that you and Terry have recovered fully and enjoying the beauty of Hawaii’s wonderful places and beautiful weather 🥰
    I loved how you shared, seventy million years of nature’s labour of love and world got its one of most amazing island 🤗♥️
    Thank you for letting us know that my dear friend ♥️
    The panoramic view of the place looks awesome and interesting 👍
    China wall point sounds dangerous yet very beautiful place, I believe there are information about this factor displayed in sign boards to keep people aware of how much careful they need to be there .
    I believe only some of the youngsters are careless in such places and don’t care about rules mentioned. In my native area many such accidents happen when young boys break rules and jump in rushing canals unfortunately!
    I would like to know this place more dear Louise 🥰
    Sending love and heartfelt prayers 🙏♥️

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  17. Hawaii was always a dream of me to visit. Therefor I read with great pleasure what you can tell about your travel there.
    Greetings by Heidrun ❤️

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Thank you for your comments! I appreciate them very much.