The last time I was out in Alberta I took a tour in the Canadian Rockies, and the tour guide described a recent hike up into the mountains. He said he found sea shells and other signs of ocean creatures near the top of one of the mountains -- 12,000 feet above sea level.
The top of Mt. Everest is marine limestone, formed at the bottom of an ancient ocean that used to exist between India and Asia.
In far southern Oregon, on Interstate 5, at the peak of Ashland pass, they had blasted oout about 200 feet of rock on both sides of the road.
It is sedimentary, and if you go about twenty miles south, you get into the slates and igneous stuff near Shasta.
I saw some odd forms in the rock layers one day and busted them out.
They are roots. Petrified roots in the rock layers.
At 4400 feet. And still rising.