wrinkling n.— Note: “Wrinkle,” spelled with an R, is a regional name for the periwinkle. «Jobs like “wrinkling”—the local term for heading out into the intertidal zone at low tide and gathering periwinkles for sale...
drying rock n. a rock in the sea whose exposed surface at low tide is used as a marker for surveying or establishing legal boundaries. Also low-tide elevation. (source: Double-Tongued Dictionary)