The phrase "a river of mud" is correct and usable in written English.
It can be used to describe a large quantity of mud, often in a vivid or metaphorical way, such as in literature or descriptive writing.
Example: "After the heavy rains, the once vibrant garden was transformed into a river of mud, making it impossible to walk through."
Alternatives: "a sea of mud" or "a flood of mud".
When he looked back, there was only a river of mud.
The tropical storm, designated Lingling, hit the southern island of Camiguin on Wednesdsay, sending a river of mud and boulders tumbling from the hills, flattening hundreds of houses.
Soldiers continued their search Friday for 68 missing people in La Pintada, a coffee-growing village in Guerrero State where a hillside had given way and a river of mud poured over the town's center.
Stand-out images include Alexandre Salem's Village of Paracatu in Brazil devastated by a river of mud after a dam burst in the country's biggest environmental accident, SkyPro's wind turbines above fog and Yuyusera's heavy pollution in Indonesia.
"We still haven't found anyone," said Adalberto Mota, 52, a store clerk who walked through a river of mud searching for five family members in the Vale do Cuiabá neighborhood of Petrópolis.
During the six-month rainy season, when the road becomes a river of mud, men with tractors wait for you to founder and haul you out for a fee.
Up ahead of me, beyond the overturned U-Haul, a few cars had got through, but now a vanguard of boulders came sluicing across the freeway, followed by a soupy river of mud.
By Tuesday, a heavy river of mud had replaced the water on Flat Street in Brattleboro, according to the Brattleboro Reformer, a local newspaper.
They develop when water rapidly accumulates in the ground, during heavy rainfall or rapid snow melt, changing the earth into a flowing river of mud or "slurry".
Rumpled and weary, Flavio Reyes has been driving a truck for 38 years along the same route, a river of rock and mud winding from this Amazonian outpost up over craggy, 15,000-foot Andean passes.
Amid the heavy rains from Tropical Storm Dolores that reached Southern California, a bridge on Interstate 10 in Desert Center between Coachella and the Arizona border collapsed Sunday, buckling into a river of water and mud.
