slate ribbon

slate ribbon

[′slāt ‚rib·ən]
(geology)
A relict ribbon sructure on the cleavage surface of slate, in which varicolored and straight, wavy, or crumpled stripes cross the cleavage surface.
References in periodicals archive ?
The bridesmaids canied bouquets of white O'Hara roses, Vendela roses, single green and white hydrangeas, white ranunculus, white Freesia, larkspur tendrils, dusty miller, and hanging amaranthus all hand-wrapped in slate ribbon.