Massive Sedimentary layers cover the continents averaging 1.5 miles thick across all continents of the world. Some exposed layers at the Grand Canyon are almost 7,000 feet thick formed with about 6 distinct rock layers but over 50% is Limestone in layers’ up to thousands of feet thick. Why are they so thick? Current processes off layering off the edge of continents are thin.
Evidence seems to point to catastrophic conditions like a global flood and not slow processes as theorized by evolutionary concepts.
https://answersingenesis.org/geology/grand-canyon/
https://answersingenesis.org/geology/rock-layers/transcontinental-rock-layers/