Chris Rowan is a geologist specialising in the dark arts of paleomagnetism, and getting people to pay him to travel to exotic destinations for fieldwork. Having drilled up New Zealand during his PhD, and South Africa in his first post-doc, he now works at the University of Edinburgh.
Anne Jefferson has a love of all things water-related and blends hydrology, geomorphology, geology, and climate change in her work. She has a Ph.D. from Oregon State University and is now an assistant professor at the University of North Carolina at Charlotte.So, here was my original plan for this weekend: post a pictures of some of the proposed megatsunami chevrons as this week's Geopuzzle, and then on Monday repost Return of the Megatsunami together with a new post which details some interesting new developments in the tale. Sadly, Ron scuppered that plan by using the Madagascar Chevrons in Where on Google Earth (even more annoyingly, even though I knew exactly where the damn things were, Lab Lemming beat me to it).
So instead, I've decided to try something a bit different, which may or may not work. I'm proposing that we go on a chevron hunt - how many of these things can we find? Are they just distributed around the Indian Ocean, or are they found around other ocean basins? Can we get an idea of sources from looking at their distributions? It could be an interesting exercise.
As a starting point, I've created a Google Map which shows the locations of the pictures from my repost (which I've put up early for reference), and Burckle Crater.
Have a look around on the map, or in your version of Google Earth, and see if you can find any other examples. Post their locations in the comments below, and I'll add them onto the map (with full credit to the discoverers, of course).
Go!
Environment
Comments
Well, hmmm
This article
http://www.iht.com/articles/2006/11/14/healthscience/web.1114meteor.php
from the Herald Tribune icludes a map (just click on the multimedia icon somewhere down the page) of all the "known chevrons". I'll leave it to the rest of you to check them out.
I wish you further luck with your hunt - in the hope that I haven't spoiled the game.
Ole
Posted by: Ole | March 8, 2008 1:50 PM
On South coast of Socotra? There are some sand structures that strike SW to NE, but they are probably eolian?
Posted by: Sman | March 11, 2008 3:07 AM