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No, I’ve never visited Yuma or looked in a deep hole there. Lol
Maybe someday.
And I don’t doubt your claim of clays and boulders.
Studies I’ve read in the past say the delta doesn’t contain the volume and or the quantities of each type of stone that should be present.
If that’s right or wrong I don’t know. 🤷
On a side note.
I really would like to see the Big Ditch again. The first time was somewhere around 1970 or so and I didn’t fully grasp, understand or appreciate it back then.
I’m adding it to my bucket list.
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