Description Shipping Calculator Sand Origin RiverBed is a beautiful, rounded, multi earth-colored sand that is a combination of super clean smooth grains with a crunchy texture, interesting colors, and can be used wet or dry. Don't be confused by the name - these are NOT river rock sized stones but it is our 2nd most popular sand when therapists feel it at conferences. Shipping is just $10 on any sized box of Jurassic Sand products. Shipping is only $10 a box! Sand Tray Calculator Sand Tray Shape Rectangular Circular Depth (in.): Width (in.): Length (in.): Diameter (in.): Depth (in.): Calculate Recommended Amount (lb.): 50 lb. bag(s) needed 25 lb. bag(s) needed *Remember to keep all measurements in inches, if you are still having trouble with the calculation call us at 877-531-8600. Jurassic River Bed Sand is a unique combination of light and dark colored sand grains that eroded out of the prehistoric Rocky Mountains millions of years ago. Like many geological formations, the process was complex, varied and to a great degree, still somewhat unknown as many of the key pieces of the geological puzzle are long gone. What we do know is that deep in Southwestern Colorado volcanic eruptions were starting 20 million years ago that were unlike anything we could possibly imagine. Vast amounts of mountain building that dwarfed the present day Rocky Mountains in both height and scope were occurring. Volcanoes brought large quantities of mineral wealth in the form of silver, lead and some gold deposits into veins and fractures of the rock. In addition to weathering out the the silver and gold, erosion slowly and surely wore down the high mountain peaks over a period of millions of years. Grain-by- grain the rock was washed down streams and blown by the winds onto the flats below. Our RiverBed Sand was washed down the watershed of these ancient mountains by ephemeral streams. That's a stream that flowed only at certain times of the year - during snow melt or heavy rains- and into a lakebed that only filled during these events. Then the wind took over and did an amazing thing. The wind action (and water) both helped round-off the grains to the smoothness you feel today. We hope you enjoy the look, feel and how clean Jurassic River Bed is. Remember, the grains are millions of years old and there is nothing you can do to hurt them. Feel free to wash them off with soap and water (or 1% bleach water) if they get a lot of use. Nothing can hurt River Bed so never throw it away - it's indestructible!
