canyon fill

canyon fill

[′kan·yən ‚fil]
(geology)
Loose, unconsolidated material which fills a canyon to a depth of 50 feet (15 meters) or more during periods between great floods.
References in periodicals archive ?
At the end of this process the City Council approved a 40-ft wide two-lane project that followed the horizontal alignment of the existing road, but incorporated a vertical alignment that improved the sight distance at the top of the hill and mitigated the canyon fill with extensive tree planting.
Re ``Sunshine Canyon fills bill for Valley trash,'' Opinion, March 6):