The new year will mark a half-century since a “seismic” shift in geology unfolded. Eldridge Moores was a key thinker in that shift. … I [Craig Miller] got another dose of that enduring youthfulness two years ago, chasing after him as he led me – at a brisk pace — down to the Yuba River bank. We were in search of the kind of “incompetent” rock that contributed to the catastrophic collapse of two spillways at Oroville Dam.