The largest grains will always be deposited first so they will be at the bottom of the beds because they could not form natrually any other way.
Not all are. Some stream beds are sandy, and some are rocky.
There were one - two beds depending on the room you were in.
You can buy custom beds made for dolls on Ebay, Etsy, etc. but if you want the real beds from mattel I think you can get them at Walmart, definitely Toys R Us, not sure about Target and Kmart, because I went to my locak Kmart today and they had no beds. But you can look online and you can find the beds online, or buy custom beds made for specific dolls.
Another name for high sleeper beds are loft beds. They are generally called this because they free up space for various activities (or later, storage) underneath the bed.
Sedimentary rocks are formed over existing basaltic rock on ocean beds.
stratification
Any type of landscaping rock of your choice will work for flower beds. www.stonedecorative.com has a wide variety of landscaping rocks.
River beds
The different rock types will be from different beds or formations that have been vertically displaced. For example moving from the handing wall of a normal fault to the footwall will bring you into older beds which may be of a different rock type.
It grows on the sea beds, but that kinda is a rock. If a coral polyp lands on a rock, I guess coral can grow there! =)
you have a big rock and some soil and stuff
Evaporated sea or briny lake beds.
At the bottom of river beds and some times in deserts.
Most likely, it would be chert.
This means a rock which is formed of many layers (or beds) of two or more different sedimentary rocks. For example, a rock which was formed in a river delta may contain sandstones and silt or claystones which are layed over each other in beds formed as the depositional environment changed on a cyclical basis - e.g. due to tides, seasons etc.
Classification of beds include King Beds, Queen Beds, Single Beds, Double Beds, Day Beds, Sofa Beds, trundle beds, bunk beds, and toddler beds.