GeoRainbows: Been There, Done That

It’s starting again… there’s another late week meme running through the geoblogosphere. Only this time I’m feeling a sense of déjà vu.


Silver Fox started it … Eric followed … Brian piled on. (Third man in is a five minute major in the sin bin, isn’t it?)

But wait. Did Silver Fox start it?

I think not. This is all Kim’s fault. And I certainly contributed, both in immediate response to Kim and again a few months later in response to nothing in particular. And just because I can I’m going to make it a hat trick.


I’m giving you fair warning, though. I’ve only got so many rainbows in the hopper and this meme is using them up fast…


Earth Science Week GigaPans

For the past two weeks (beginning with the Monday of Earth Science Week) the website has been featuring a bunch of Earth Science themed collections on their front page. There are still another couple of collections in the hopper, so you’ve still got a chance to see some of the “Geological GigaPan Goodness” on the GigaPan front page before it all disappears.

I’m working on compiling the full list of GigaPans featured in these sets. I wish I had a way of duplicating the random zooming image like you see on the GigaPan front page. Until then, here’s one from my recent Mineralogy class field trip to the Black Hills…

Homestake Open Pit Mine, Lead, South Dakota
Launch Full Screen Viewer | View in Google Earth 4.2+


I should have posted about this two weeks ago when they were just starting up, but better late than never. (Besides I need a post tonight to keep my “streak” alive.)

Giant Forest (Granodiorite)

Nothing like a good ‘ol geoblogospheric meme to get one back in the swing of posting, and it seems the meme of the week is trees. Geotripper got it started with an oak(?) in the meadow just north of Sentinel BridgeGoogle Earth Placemark. He also mentioned Ansel Adams’ famous Jeffrey Pine on Sentinel Dome. Personally, my favorite Ansel Adams tree is the one featured in Early Morning, Merced River.

My own favorite tree is a Giant Sequoia (Sequoiadendron giganteum) in the Lost Grove in Sequoia National Park, alongside the Generals Highway. It’s not easy to capture a giant sequoia in a single photograph, but fortunately I had my QTVR gear with me last time I passed that way…

Giant Sequoia, Lost Grove, Sequoia National Park, June 27, 2005

View in Google Earth 4.2+


Now you may wonder, what’s the geological angle? Well, it turns out that somewhere down under all that leaf litter on the forest floor is the Giant Forest Granodiorite of the ~100Ma Sequoia Intrusive Suite. How many other rock units are so intimately assiocated with a type of tree? The “macro” GigaPan below you can see a hand specimen of the Giant Forest Granodiorite. Zoom in to see the details of the mineralogy. How many minerals can you identify?

Giant Forest Granodiorite
Launch Full Screen Viewer


Where on (Google) Earth #149?

What… you mean I’m supposed to post the new WoGE challenge when I find one? It’s been so long since I won that I was beginning to forget. (Not to mention that it’s been so long since I’ve geoblogged it’s a challenge to remember how to make any post at all.)

Fact is, Péter Luffi just hammered me with WoGE #142 and after much gnashing of teeth I figured I needed to focus my attention on the things that pay the bills. And then inertia took over. Fortunately, EffJot finally found it and WoGE was once again rolling along… until I solved WoGE #148 last Friday and left everyone waiting… and waiting… and waiting…

Although I’ve been remarkably quiet on the blogging front I’ve still been surfing Google Earth and I think I’ve found my new favorite geological view of all time. There’s so much geological goodness in this one that I don’t feel so bad about the fact that it’s zoomed way in and at a low oblique angle. (Don’t like that? Then wait for WoGE #150.)

As always, the winner is the person who first posts the location of the feature(s) in question (latitude and longitude will suffice), but there’s so much good geology in the view that it’ll kill me if the winner doesn’t give it the explanation it deserves. Okay, enough talk… let’s see it:

Where on (Google) Earth #149

No Schott Rule, since I’m not playing this round. :-) But it’d be considerate if you got your geological explanation in order before you blurt out the coordinates, okay?