â¢ SULTAN (noun). The noun SULTAN has 1 sense: 1. the ruler of a Muslim country (especially of the former Ottoman Empire). Familiarity information: SULTAN used as a noun is very rare. SULTAN (noun). The noun SULTAN has 1 sense: 1. the ruler of a Muslim country (especially of the former Ottoman Empire). Familiarity information: SULTAN used as a noun is very rare.
Fossils also form from molds and casts. If an organism completely dissolves in sedimentary rock, it can leave an impression of its exterior in the rock, called an external mold. If that mold gets filled with other minerals, it becomes a cast. An internal mold forms when sediments or minerals fill the internal cavity, such as a shell or skull, of an organism, and the remains dissolve. Organic remnants. In recent years, researchers have discovered that some fossils aren't just made of minerals.
 +++  Fossils do not form into sedimentary rock, but as th â¦ e question  says, are in many, though not all sedimentary rocks. A fossil is  the cast of a dead organism whose decayed-away tissues or bones are  replaced by minerals in the parent sediment.Oil and coal are fossil fuels formed from organic debris, but  other fossils do not turn into them.  .  Metamorphic rocks are formed from any other rock by heat and/ or  pressure, not necessarily by heat alone; but metamorphism generally  destroy any fossils in sedimentary rocks undergoing the change.