Dipped in flour

• Sprinkled with flour
• Unearthed (with "up")
• Scraped (river bottom)
• Brought (up), as from the distant past
• Hauled up (from depths)
• Scraped the bottom of
• Coated in flour

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Dredge \Dredge\ (dr[e^]j), v. t. [imp. & p. p. Dredged (dr[e^]jd); p. pr. & vb. n. Dredging .] To catch or gather with a dredge; to deepen with a dredging machine. --R. Carew. Dredging machine , a machine (commonly on a boat) used to scoop up mud, gravel, ...

Wiktionary Word definitions in Wiktionary
vb. (en-past of: dredge )