Why is a Nuclear Power Plant built near a fault? 

Thanks Cathy. You're too kind.

@@geologicallyspeaking just truthful! You’re a breath of fresh air in this crazy, mixed up world! Happy I found your channel!!

Haha thanks Chad! Whoa! That is quite the list, but an interesting list for sure. I've got my work cut out for me. 😃

Thanks Elsie!

Again, I like it! Thanks for contributing!

Based on what I’ve read it’s around 125,000 years. They studied isotopic ages from fossil shells from the San Onofre platform to arrive at that estimate.

@@geologicallyspeaking OK I am totally baffled. There is 100+ feet on first boulders coming from massive outwash of waters from somewhere. 125,000 YA is earlier than end of the Ice Age 12,000s/10,000s BC (and no actual glacial fronts down this far south into Cali. Any such finger glaciers atop the Sierras - possibly ? Enough depth of snow and ice to wash out this nearly uniform layer of 1-2-3+ layers of boulders, then this huge dramatic mudflow. If we could say that there HAS TO BE a vast water source for those rounded boulder emplacements, then that water was HUGE! Only appears as an vast and melting glacier, a Cali glacial lake erupted like the WA/OR glacial floodings, leaving all this mud and muck at some ancient stopping point along this (now) current shoreline, or that were was massive (and continued seichis) of the Owens Lake, Central Valley inland waterways that was continually shaking and sloshing and throwing up such bottom mud and muck onto its shorelines 100+ miles (!) away. One questions then, if someone notices any such mud and muck sloshing up against the Sierras for this once Central Valley inland sea, lake, glacial lake. As you explain, this shore formation is not the start of its appearance, but that it extended a huge distance out into the sea, that has been washed and eroded through time to its current location and sea level. That make this EVEN MORE HUGE !!!! This isn't like the other vid of the dried river bed with its various granite et al boulders and pebbles that washed down out of the nearby mountains. If this layer of boulders and pebbles in that boundary layer are up and down the coast, as well as its ancient "out there" extant of its once expanse, then that entire layer of boulders is (I don't have a word bigger than HUUUUGGGGEEE ! - cosmic?) event happening that would line the entire strata for miles with boulders, and then later slosh up such massive formation of 100+ feet of mud and muck. As Central Valley would have this "stuff" in its basin, then it almost mandates that Central Valley has been shaken, uplifted, shaken and dropped a vast number of times - and puked out all this material, sloshing up against the Sierras, but also then sloshing out westward to the ocean across a massive and growing estuary bed. Only later would coastal mountains and these uplifts create the coastal geology and boundaries of Central Valley. How else explains this muck ? You say marine fossils - OK. Then this massive land of estuary and delta plains of an ocean shoreline was once much lower and further out to sea (we can agree on that). This region of sloppy muck, not swamps, trees, moss, etc, just MUCK was 125,000 years of a previous massive outwashings from the mountains of those boulders onto that deep and flat seabed, then further outwashes of inland muck, and oceanic detritus was accreted onto the seabed and boulders. Over time, all of this sandstone and muck was metamorphed, and thrust up to its current position. And the sea cut from top to bottom of this uprising geology for these vertical cliffs. There was HUUUUGGGGEEE events happening in this area by land, by water, by sea, by uplifts. How big x tens of miles? is this formation known to exist. Is there a defined river or inland waterway delta that answers those boulders and mudwash outflow? It is like the biblical flood (and I'm not laughing ...) with such massive waters that washed any and ALL inland topsoil off the Sierras down to Central Valley and out to vast depths of the sea, and eventually it gets uplifted !!! Those boulders have their own noted drop velocity from speeding water - that can be known. That water velocity and depth, did not leave any accompanying mud within a huge layer of "stuff." That would be easy to calculate. If one says that the whole of this boulder and mud-muck happened at the same time (R U S M ??? !!!) such massive 100+ feet of small boulders (no huge glacier erratics here) with 100+ foot of massive flowing mud-muck waters, then coming up against an ancient barrier, the waters stopped, boulders dropped, and then one would have all the higher sand, clays, and silts start deposition. That doesn't appear to be so here. No big boulders, no layering of the mud-muck. It is like our Livermore (once swamp basin) with the Altamont Pass here, was once a waterway, like the Sacramento and San Juaquin river systems flowing into SanFran Bay. We probably have the same mud-muck depth in the Bay (now), surrounded by coastal mountain ridges and uplifts. So seeing no great seaward formations that would be those outward boundaries in these 125,000 years, they were eroded by ocean erosion. But this vast portion of area, was undersea (sand, clean sand, clean ocean water), then bouldered by only fresh water outflows), and later massively mucked up, and then uplifted. 100+ feet !!! Lets say 125 feet. 125 feet of accretionary mud-muck in 125,000 years of time, and uplifted. That is 1 foot of mud-muck sedimentary erosion flowing across this delta plain, estuary, and seabed swamp for each 1000 years. I don't know of mud-muck growing further mud-muck. It is only erosional and sedimentary accretion, and any such oceanic detritus falling down and creating this swampy muck bottom. As this sandstone is clean and clear, this assuredly was a clean ocean environment, and a fault line was involved, when a Monterrey shale formation confronted this region. Still oceanic sand basin is younger. The vastly older region of mud-muck of clays and silts turning into mudstone, siltstone into shale, not long enough with depth, time, and pressure for slate. So the Monterrey shale appears to be way older than the nearby clean ocean bed sand(stone). Then this had to be uplifted so that a vast horizontal delta with a water outflow of massive depth and velocity layers an entire geological boundary of small boulders and pebbles - clean rocks no interbedded sand, trees, vegetation. Then this must have dropped down again to be the last mud-muck for 125,000 years of outwash erosion and sedimentary accretion - along with the again dirty ocean mud-muck swamp. In that same time, the whole formations were upthrust into their current elevation. This land appears to have MASSIVE multiple uplifts, drops, and final upthrust. That is massive California landshaking !

For sure John! I like it!

Thanks Charles. Appreciate that.

Thank you kindly!

Thanks Lorraine!

Thanks for watching!

Thankfully, the plant has run its course. I live in San Clemente and have always had my iodine pills nearby 😉. My buddy is actually working on the team dismantling it right now. Fascinating engineering goes into those power plants. 🤯