A dodo egg is a renewable food item that is randomly left behind by a dodo bird. Dodo eggs are large and oval in appearance with a light blue shell with a wavy pattern or darker areas.
As a result, rocks form quickly and mineral crystals are very small. Rhyolite is one type of rock that is formed when lava cools. It contains similar minerals to granite. However, as you can see in Figure 3.21, the mineral crystals are much smaller than the crystals in the granite shown in Figure 3.20.
Rocks All rocks are formed from minerals. There are 3 main classifications of rocks they are igneous, sedimentary, and metamorphic. These rocks are formed under different conditions and posses certain characteristics.The characteristics a rock has depends upon the condition in which it formed.ther Forms of Sedimentary Rock. Chemical: form from the evaporation and precipitation of dissolved minerals. The precipitation of a mineral forms rocks called evaporates, for example, limestone, rock salt, gypsum, etc.