Ramblings about what I encounter within the realm of the geosciences, as well as the occasional rant about nonsense.

30 August 2009

Aloha

As I mentioned previously, I had the opportunity to go to Hawaii this summer. My brother was presenting at a conference in Waikiki and my parents thought the whole family hadn't spent enough time together recently so they insisted we all go (fortunately, they did the heavy financial lifting to get me there... Yay Parents!). So here are some pretty pictures I took from the 50th state (which according to the birther crazies isn't a state at all... go figure).

The first island we visited was Maui where we stayed at Wailea. Wailea is on the East lobe of Maui, and a convenient distance to the most recent eruption on Maui, La Pérouse Bay. The best guess for the age of the most recent eruption is around 1790. There has been some minor controversy about this. The reason why 1790 is an approximate age is French explorer Jean-François de Galaup, comte de La Pérouse landed in Maui in 1786 and made a map of the bay, when George Vancouver landed in 1794, there was a basaltic peninsula that wasn't on La Pérouse's map.

The controversy lies in the dating of the eruption and general cartography. Reported radiometric dating of the basalt suggest it is closer to 1490 (however, I wasn't able to find a paper on this, just a brochure from a tourist kiosk). Some scientists have also questioned the quality of La Pérouse's mapmaking skills (apparently, some claim, you wouldn't recognize ANY of the islands from his maps). Though I did find this quick blurb in GSA Bulletin by Oostdam (1965). He argues that that La Pérouse's maps were, in fact, very reliable for their day. Below is a shot looking back towards Haleakala of one of the most recent flows on Maui. In any event, these eruptions lead to the existence of black sand beaches. It was one of my goals to find such a beach just so I could collect a small vial of black sand (which now sits prominently upon my bookshelf). Here is a photo overlooking just such a beach near La Pérouse Bay. And I might as well wrap up this post with a picture of Pu'u Ola'i which is the remnant of a cinder cone on the island of Maui that was active about 0.1 Maa.That should do it for this post. I will probably discuss visiting Haleakala National Park in my next post, unless I think of something else to talk about.
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Cited:
Oostdam, B. L., 1965, AGE OF LAVA FLOWS ON HALEAKALA, MAUI, HAWAII: Geological Society of America Bulletin, v. 76, no. 3, p. 393-394.

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All the Latin on this page is from my vague recollections from High School. There are mistakes in the text. I just was trying to get the point across

Between Los Alamos,NM and White Rock, NM

Between Los Alamos,NM and White Rock, NM
The photo of the travertine spring was taken in the small opening in the center of the image.

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