Randall Carlson
speaker
1,469 appearances
2 recordings
2 series
first heard Apr 2025
last heard 11 Mar
Randall Carlson’s voice in public audio — every appearance, attributed to the second.
Trend
recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Mar 2026 with 1.
Appearances
The lead band was the Grateful Dead, but I didn't know any of this back then. Okay, so I had no idea that... Yeah, so Devil's Lake was one of the discharge points of Glacial Lake, Wisconsin, as it's called. And it cut this trough. You're going to see very much these troughs like this right in here.
Yeah, you can follow the flow south and it cut to the east and then it discharged down and flowed out north. And there we go again. There's another underfit river, Wisconsin River, and it goes down and meets the Mississippi.
They're way behind on all this.
I mean, they're literally decades behind. Yeah.
Some of them are. Yeah. Yeah.
You know, 20 years ago you had almost total, you know, like you had a group of geologists that were acknowledging that the channel scab lands was catastrophically produced and, But what I could show you, and again, this is more time than we'd have to get into here. I can show you, for example, you have a study on Lake Wisconsin and its catastrophic outburst.
Then you can go to the plains of North and South Dakota and you'll find separate studies there. You can go over to study on Connecticut River or the Hudson River. What hasn't happened, though, is integrating all of this into a coherent model. That hasn't happened. That's what I'm trying to do. I'm trying to get, you know, we got to look at the big picture here.
What was happening with the cutting of Grand Coulee, and if you look at Grand Coulee, you'll see that, and then you look at Lake Seneca, one of the Finger Lakes, they're almost the same.
So Grand Coulee, zoom out a little, Ryan. God, I've been up and down this Coulee more times than I can count. But this was one of the main discharge of the, over here, over the Canadian Rockies, the ice sheet was called the Cordieran. And the southern terminus of the Cordilleran Ice Sheet was right at the head of Upper Grand Coulee. If you zoom in, Ryan, on Upper Grand Coulee, okay, good.
Now, all right, so you see where the Grand Coulee Dam is, took its name from Grand Coulee. There it is. And that, interestingly, Grand Coulee Dam almost marks the exact point of the southern margin of that lobe of the Cordilleran Ice Sheet right there. But you can see, pull up just a little bit, and we'll see, no, I'm sorry, go the other way. Go the other way. Stop right there.
Now, if you look there, you're going to have this, what's called the Great Notch. So if you go, you see where Grand Coulee, the town, is there. And if you hover, you can see there's cliffs on the north and the south. So if you go on the top, right where your cursor is, the top there has the same elevation. If you go up to the other side of the notch... To the north, yeah.
So those have the same elevation, and those walls are about 700 to 800 feet high. Wow, okay. So that was where this major discharge came off the ice sheet and began down-cutting through the basalt bedrock right there. And when that happened, the town that we just saw wasn't there. No. In case you were wondering. Right, right.
Yeah, in case you were wondering, Ryan. Okay, so the discharge through this. Now, Ryan, follow this down. Follow that. Yeah, there we go. Now, pause right there. See, look at that outcrop in the middle there called Steamboat Rock. Wow. Okay. That is a remnant of the pre flood. Land surface.
And if you go over there to the west and you're on top of the cliff that, or the east, the elevation of the top of steamboat rock is the same as the elevation on either side of it. Let's see what we're, oh, this is taken from the top of steamboat rock right here.
Yeah. So we're looking, I believe, to the north there, and those walls over there are very between five and 800 feet high. And before the flood, that land surf, that flat surface on the left was continuous with the cliff over on the right.
Yeah. Uh, I think the major erosional event was the most recent though.
And you can see, and there are reasons we, we can.
Just blew all of this land. Yes, now the blue, they're using Upper Grand Coulee as a temporary reservoir. The water that's backed up in Franklin Roosevelt Lake is being pumped up into Upper Grand Coulee, and then it's distributed from there over the eastern Washington for irrigation purposes. But follow that down to the south, Ryan, and we'll see, we'll come to the Great Cataract Complex.
There we go. Stop right there. Now zoom in on where it says Sun Lakes Park. That is the Great Cataract Complex right there. Now that is an extraordinary feature. And what we're looking at there is called a recessional cataract. And the water's coming from the north, and it's scouring and sculpting. It's all exposed bedrock terrain, basalt bedrock terrain.
And as that water, the water flowing here was about five miles wide and 400 feet deep. That was roughly the scale. It's from the far left over there where the highway wraps around the cliff. right there over all the way to the far right, uh, right in there. That's between five and six miles wide in there. And like I said, the cliffs are about 400 feet high.
Showing 1061–1080 of 1,469 · page 54 of 74
← Previous
Next →