Outside the Interzone
Outside the Interzone 's Latest Posts
Looking down into the same cove we saw from a bit farther back yesterday, the west (left) wall is improbably flat and straight. This is almost certainly a fault surface. It could possibly be a joint, but the jointing here is extremely irregular, and such an extensive one along a consistent plane seems unlikely. Above the sea cave in the middle left f the photo, we can see two vertical fractures which apparently form the boundary of that cave; from that we can see they're roughly parallel. I'll […]
Back in July, Dana and her friend B. made a whirlwind visit, and we headed over to the coast for cooler weather. Many of the spots on this trip were ones I've covered before in the Geo series, but the photos are different. In particular, looking through the folder, this trip happened to be at near high tide, so there are some distinct differences, emphasizing the importance of considering tidal variations when planning coastal geology trips. Here, we're looking north from Yaquina Head, over a […]
I've already posted a number of items about the Cheshire Cat Quarry in the Quartzville area; more on that in a moment. But when I was up there earlier this summer, I wanted to get a photo of the contact with something for scale. Unfortunately, the light wasn't good, and I didn't notice at the time, but the photo is poorly focused as well. However, the contact between the hackley-jointed basalt and the underlying buried soil (paleosol) is evident to Bobby's left- your right. That soil sits atop […]
The final shot of Liesegang rings from this spot is a closer view of yesterday's outcrop. The black spots on older surfaces are manganese oxides. In dispersed forms, these can provide a purple coloration to rocks, but I'm betting most of the reds and oranges composing the rings are the result of iron oxides and hydroxides.Photo unaltered. June 14, 2014. FlashEarth Location.
The last two photos have been of a single, loose block, fallen from this outcrop. Here, we see the Liesegang rings in situ.Photo unaltered. June 14, 2014. FlashEarth Location.
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