The phrase "area spreading" is correct and usable in written English.
It can be used in contexts related to geography, environmental science, or any situation where the expansion of a particular area is being discussed.
Example: "The area spreading of the wildfire has caused significant concern among local authorities."
Alternatives: "expansion of the area" or "area expansion".
Last summer, the company began an advertising campaign in several influential markets across the country, including the New York City area, spreading the message not only to doctors but to prospective patients, too.
By locating the new HS2 engineering HQ in Birmingham we are bringing skilled job opportunities into the area, spreading HS2's benefits beyond those using the new rail line.
The various micellar ferric and ferrous species appear in the reaction area (spreading for ~400 μm from the steel surface) at the average pH value in the range from 7.0 to 9.5 where the numerous products of electrochemical processes and their hydrated and/or oxidized forms (Fe(OH 3, Fe2+, FeOH+, Fe(OH 2, and OH−) simultaneously interact with each other [7].
"When you have rain and snow seeping down into the moving groundwater plumes, that radioactive material is moving outside of the blast area, spreading into other wildlife areas and waterways".
Greater Antananarivo is a continuous, urbanized area spreading beyond the city's official boundaries for 9 km north to south between Ambohimanarina and Ankadimbahoaka, and 6 km west to east between the Ikopa River dike and Tsiadana.
According to Renfo, she and another American went to a drug house where Holloway supposedly was, bringing money, but found that Jug Twitty had already been to the area, spreading "a lot of uproar and panic in the direct vicinity", and nothing could be accomplished.
This meristematic area spreads laterally from each bundle and eventually becomes continuous, forming a complete vascular cambium.
A third right-bank area spreads beyond the 19th-century fortifications and is characterized by numerous modern buildings.
There are bigger challenges: rush-hour gridlock, poverty in the south and affluence in the north that has seen the urban area spread into neighbouring South Gloucestershire.
The present-day Denver metropolitan area spreads well into the foothills to the west of the city and the high plains surrounding it on the other three sides.
The gypsiferous marl and limestone area spread in all area (Mahdavi and Fazl 1988).
