Two things. There are no erosion patterns to be found in the geological column that matches what Dr. Brown's mention. Also, 10^33 ergs is equal to 100 octillion watt-seconds (joules), or 100,000,000,000,000 Terawatts. That's a couple of orders of magnitude greater than my estimates. That heat is going to really cook Noah and his.
As I said, I didn't do the book justice to super-summarize like that. You really should read it, because it does have a lot of detail along those very lines. It may very well answer your questions.