From the Super Mario Wiki
Two Sand Spouts
in World 2-1.
Sand Spouts in the fourth level of the Coin Battle World.
Sand Geysers (or Sand Spouts) are pillars of sand that rise up out of bottomless pits. They can temporarily help the player cross gaps and reach elevated areas. If Mario jumps into one, he is carried up to the top of the geyser by its force. They appear in New Super Mario Bros. Wii and New Super Mario Bros. U, in World 2-1 and World 2-5, and Spike's Spouting Sands and Blooming Lakitus respectively, as one of the main elements of the levels. They also appear in the World 2 map, between World 2-5 and the Spiny Enemy Course. Additionally, Sand Geysers also appear in the World Coin-4 in Coin Battle mode. They have the same functions of Water Spouts, that appear in New Super Mario Bros. U.
- ^ Stratton, Steve (November 18, 2012). New Super Mario Bros. U: Prima Official Game Guide, pages 59, 60, 67.