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The forest thinned until the path opened onto a limestone shelf above the water. Below, the river moved without hurry — pale green near the shallows, darkening where the channel cut deeper into the stone.

She had read the word before, in a geology paper years ago, but never quite felt it until now. The river was effervescent in the morning light, its surface alive with tiny bubbles where the current crossed the shelf.

Farther down, the bank softened into silt and reed beds. A kingfisher dropped once, twice, and vanished upstream. She kept walking, the meaning still ringing in her mind long after the word had passed from the page.

Leafy popup defining effervescent
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