Quicksand may be found on riverbanks, near lakes, in marshes, or near coastal areas.  Quicksand is a shear thinning non-Newtonian fluid: when undisturbed, it often appears to be solid ("gel" form), but a less than 1% change in the stress on the quicksand will cause a sudden decrease in its viscosity ("sol" form).
Quicksand can be located any place rising water lifts the sand grains enough that when weight is applied to them they move laterally and allow the weight to sink down through them. This can be in a small artesian type spring but my experience has been that is most often found in a sand choked river channel with steep confining banks.
If you step into quicksand and you're wearing a backpack or carrying something heavy, immediately take off your backpack or drop what you're carrying. Because your body is less dense than quicksand, you can't fully sink unless you panic and struggle too much or you're weighed down by something heavy. If it's possible to get out of your shoes ...
Quicksand is rarely found in deserts, due to the lack of water. It's also not a specific kind of soil -- any area of ground that has been sufficiently soaked with water to the point where it can't ...
Liquefaction is the basis for quicksand formation, and can occur wherever underground water is present. Therefore, quicksand is found near bodies of water (whether above or below ground) such as at river deltas or near shores. It does NOT occur in the desert, because of lack of water! Quicksand is found most anywhere water and sand mix every day.
Quicksand shows up in movies, where the hero gets pulled out of a quicksand pit moments before his inevitable demise, but how much do you know about quicksand? How common is it? Where can quicksand be found? How is it created? Is it common? How many people die from quicksand? And most importantly, how do you escape from quicksand?
Nobody will blame you if you can't get yourself out. A study published in Nature found that the force needed to pull your foot out of quicksand at a speed of one centimentre per second would be ...
There is another, more sinister flavor of quicksand called dry quicksand which is potentially a lot more dangerous, though there are no confirmed natural occurrences of the phenomenon. Dry quicksand is created when grains of sand form a very loose structure which can barely hold it own weight, like a house of cards.
Quicksand is found in many parts of the US. Places that I am familiar with include New Jersey, the coast of North Carolina, and many areas in the Southeast (particularly Florida). In general, however, quicksand can occur anywhere where two conditions are satisfied: sand and a source of rising water.
On the bright side, it's impossible to drown in quicksand if you keep your wits about you. Quicksand is much more dense than water, so you have much more buoyancy. Your body will only sink about halfway. Quicksand is often found at the seashore, so what actually happens is that the people drown when the tide comes in.