BRian I got disoriented on trying to figure out which way that basalt wanted to go in your second pic above, it almost looks like 2 photos side by side, the effect is very disorienting!
Rocks
- Thread starter SculpinSwinger
- Start date
Yeah, I am facing north, the formation has a southern facing exposure. It kinda looks like the earth was spinning like a centrifuge!
Possibly a feeder dike oozing a little Columbia basalt magma, cooling and partially plugging the fissure, then oozing a little more out in a horizontal attitude, rinse and repeat layers until it completed. Amazing formation. I may send the images to Nick Zentner and ask him if he sees this in other locations.
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I would be remiss if I didn't mention who Nick Zenter is. He is a Prof at CWU teaching the geology of the PNW to people of all ages.
He uses the phrase "German Chocolate Cake" to describe the Columbia Basalt lava flows.
easily the most entertaining and knowledgeable prof I have ever listened to, enjoyed every minute of it, and plan on working my way through all his content.thanks so much for the intro!
My brother is a pretty serious rockhound and has watched his entire video catalog. I've watched quite a number of them.
His live lectures are very engaging. He typically does a 2-3 day series of lectures on a particular topics, and folks come from all over WA, OR, and ID. A fun way to spend a weekend is to combine his lecture series with a DIY field trip into the hills, and perhaps do some fishing.
I think I may have found one today while out rockhounding with my brother and nephews.
We're in E'burg to attend 3 Nick Zentner lectures in the evenings and roaming agate and geode sites during the day.
...from this video.
that is a nice pic . great find.
Fourbtgait
Life of the Party
That took me down a rabbit hole reading field trip reports for the past 4 hours. And only barely touched them.
The 1901 USGS Spokane quadrangle is an interesting map
G_Smolt
Legend
A broken slab of the Delmar formation, next to parent. ~48my old, overlaid with the Torrey sandstone formation. San Dieguito river mouth in the distance.
When you gets closer, you realize it's not just rough rock...it's millions of oyster ancestors.
Speaking of Torrey Sandstone - a lithified palm tree on an exposed patch of the Torrey deposit, La Jolla.
Rocks are cool.
When you gets closer, you realize it's not just rough rock...it's millions of oyster ancestors.
Speaking of Torrey Sandstone - a lithified palm tree on an exposed patch of the Torrey deposit, La Jolla.
Rocks are cool.
Might have been a weight for a fishing net.
