BTW, the bits of breccia in the YOUNGER layer (seen at 1:15 in the vid) surely suggests something ground up the lower layer and mixed bits in with the higher/younger layer in very violent dynamic action. Sand slowly sifting down onto the lower layer would NEVER cause this! How would the bits get moved UP any?...especially any more than just the first foot or so above the unconformity?
W:Yes there was an erosional phase of the exposed greywacke initially before the strata was completely buried by red sands transported by rivers. So of course eroded fragments of greywacke would be mixed with sand in the basal layer of the Devonian sandstone.>>
If your AE view is that the older layer got tilted vertical, THEN got eroded (is that your view?) and then later it was back underwater during sand(stone) deposition, then you would expect this
But instead it looks like this:
The entire GC looks like this. If there were millions of years erosion between the different horizons then it ought to look like the first one.
>>Where the Devonian sandstone lies on top, the contacting greywacke has not yet been exposed to erosion.>>
I don't get it. How could it get uplifted and tilted to vertical and it NOT be exposed to erosion? And if it was always underwater, then how could the Devonian layer get added on the top AND have bits of breccia from below within it? As soon as the first few inches of DS gets added then it blocks any of the bits from the SG from being mixed into the DS.
This is Brown's position about ripple marks: LINK
The hydroplate theory, supported by hundreds of other evidences, easily explains ripples on the Continental Divide. Sediments, eroded by the escaping subterranean waters during the flood, were quickly deposited through those waters. On the continents, those deposits average more than a mile in thickness. Liquefaction sorted most of them into the prominent layers we see today, and fluttering hydroplates produced gigantic waves, causing ripples even on the deep seafloor. The compression event buckled, crushed, and lifted the Rocky Mountains within an hour. (That lifting of the seafloor up through the water also caused a powerful, ripple-producing flow.) Prior to the flood, supercritical water in the subterranean chambers dissolved and uniformly spread cementing agents, such as silica and calcium carbonate, throughout the water. Months and years after the flood, the warm flood waters cooled, so those minerals came out of solution, lodged as precipitated solids (or cement) in the tiniest spaces between sedimentary grains. What were the forces, energy, and mechanism that produced ripples on the Continental Divide? Gravity, the kinetic energy of massive hydroplates sliding downhill, and buckling.
I suppose the question for YOU is where can such extensive ripple marks on the bottom of the ocean floor be seen today? Brown has a suggested answer...what is yours? I just read wiki's wacky suggestion...submarine landslides. RIGHT. And exactly WHERE ON THE PLANET can you find any underwater sediments being laid down today that look anything at all like greywacke???