Cannibal Panda (her pseudonym on Twitter) recently sent me some rocks and money to ship her a chunk of blueschist, and a few other miscellaneous items I tossed in for good measure. So here's what's going out:
from here, and a post on the rock and location. The lens cap is 52 mm in diameter. Also you can make the photos much, much bigger if you right click on the lens cap, then choose "Open Link in New Tab." Weird how that works.
this road log, in the Quartzville area.
Located here, in the northwest corner of Nevada. This sample has an excellent geopetal structure, that is, one that
tells you not only the direction "up" when it formed, but gives a very
precise horizontal as well. It can be found in one of the photos of the rock here, but I'm leaving it as a puzzle for Cannibal Panda to find. I don't think it'll be very obvious in the photos. No more clues for now
Since I'm a bit anal about commenting on safety issues when I post spots that I think could be hazardous I'm compelled to add: parking is NOT obvious. Park here, then walk a couple hundred yards down hill to the cut. DO NOT park in the cut. Yes, there's room, but as the road is turning inside a fairly narrow trough, you are not visible until the last second. Cars coming in the lane on the south side are coming downhill fast, and do not expect people on the side of the road. There's plenty of room to get well off the pavement on that side, where the exposure is best, and you'll hear vehicles coming, but they won't see you until literally a second or so before they pass, so they have no time to react.
the Quartzville road log.
written up by Dana Hunter here, and from Mile 11.2 of the Quartzville Road log. This sample consists of mostly weathered surfaces. To get the sooty black to rub off on your fingers, you'll have to chip a fresh surface. But it is a cool and puzzling phenomenon: a rock soft enough to smudge your fingers, but at the same time, hard enough to scratch steel. (Incidentally, despite Dana's comments, I didn't write a whole article about it for OSU. We used one photo of a microscopic view of this rock to illustrate a GSA field guide for teachers on the petrified wood in this portion of the Western Cascades.)
Is This Your Hat?
2 years ago