The shifting scale of geological inquiry can give you spatial and temporal whiplash. You go from scrutinizing a tiny quartz crystal to trying to sort out the arrival of a massive inland sea or go from contemplating a single layer of ash that took a few minutes to fall to an entire formation that took millions of years to settle.
One way to hold all these scales in mind is sit for hours in quiet contemplation of scientific manuscripts. Alternatively, you can speed things along by laying hands on the rock you’re interested in. Fortunately the whole point of being in the Turkana Basin is to get into the the field to hold the rocks rather than read about them.