The geologist who'd mapped the canyon had been dead for thirty years, and the canyon didn't know.
It held her routes anyway — the trails she'd cut to reach the lower strata, the notches she'd marked in the rim where each transect began. Her graduate students had followed the same paths until the paths became official, until the park service paved the upper ones and put guardrails on the overlooks. By then nobody remembered that the switchback at mile six existed because she'd found it was the only place where the Kayenta Formation was exposed without a scramble.
The river had done the same thing, of course, over a somewhat longer interval. It had carved the entire mile-deep cross-section and then left. Not all at once — the Colorado still ran at the bottom, a small fraction of what had cut the rock. But the cutting was done. The canyon was a portrait of a river that no longer existed, painted by a river that had since become something else.
She'd understood this. It was the second line of her field notebook, written the first morning of her first visit, when she was twenty-three and the canyon was as old as it had ever been: The water is the verb. The rock is the tense.
Her own notebooks were in a university archive now, in a climate-controlled room that would keep the paper stable for centuries. Nobody read them. The trails were read daily — hundreds of boots following a path that had been, in its first form, a young woman deciding where to step.
The canyon held this without interpretation. It was not a monument. It was not a memorial. It held what had passed through it because holding was what canyons did, and the holding and the being were the same act.
On the south rim, near the switchback she'd found, the afternoon light caught a seam in the Coconino Sandstone where the grain changed direction. A cross-bedding plane. Two hundred and seventy million years ago, the wind had shifted. The sand had recorded the shift. The wind had moved on.
Everything that passes through a medium changes the medium, and the medium goes on being changed after the passage ends. This is not memory. Memory requires a rememberer. This is just shape — the present tense of a past event, carried forward not by intention but by the fact that stone, once carved, stays carved.
The guardrail at her overlook needed paint. A volunteer would repaint it this summer, following the path she'd cut to reach it, and the path would go on being followed by people who'd never heard her name, which was the same thing the canyon did with the river, which was the same thing the river did with the rain, which was not remembering but was not forgetting either.
It was passage. The word that means both the act of moving through and the channel left behind.