The word 'silty' is correct and can be used in written English
You can use it to describe something that feels or looks "silty," meaning composed of small bits of something, like sand or clay. Example sentence: The riverbank was silty and slippery, making it difficult to walk on.
"First you have to look at all this Istanbul, simmering in a silty bath of sunset light.
During a three-month dry season when the water level drops, the phumdi sinks to the lake-bed, where it is compacted and replenished, putting down roots into the silty ooze.
The first, "Sea of Poppies", set a year earlier, conjured up the dust-baked heat of the north Indian plains, awash with the violent red billows of Papaver somniferum, the British opium factories and the wharves of the silty Hooghly River from where the sticky, addictive stuff, packed inside clay balls the size of cannon shot—"foreign mud" in Chinese eyes flowed to the Celestial Kingdom.
Major river valleys that carried summertime meltwaters, such as the Missouri, Illinois, Wabash, and Mississippi, dried up in winter, allowing the cold winds to blow silty river sediment onto the uplands.
Continental shelves are usually covered with a layer of sand, silts, and silty muds.
In nearshore sandy and silty environments, bivalves, burrowing organisms, brachiopods (lamp shells), and simple corals abounded.
The Kara Sea formed as a result of deglaciation during the last Ice Age, traces of glacial ice being found under a thin layer of silty sediment.
Silty alluvium covers most portions of the North China Plain area of the province.
Silty soils, on the other hand, exhibit the least resistance to erosion because their permeability is low (resulting in more surface runoff), and their particle size is neither small enough to promote cohesion nor large enough to prevent entrainment.
In 1980 the International Commission on Stratigraphy established the Global Stratotype Section and Point (GSSP) defining the base of the Ludfordian Stage in Sunnyhill Quarry, a silty limestone quarry near the town of Ludlow, Shropshire, England.
