Sediment: a soft substance that is like a wet power and consists of very small pieces of a solid material that have fallen to the bottom of a liquid

Mud: earth that has been mixed with water.

Horseshoe: a shoe for a horse formed of a narrow band of iron in the form of an extended circular arc and secured to the hoof with nails.

Footprint: an impression of the foot on a surface.

Fish: an animal that lives in the water, is covered with scales and breathes by taking water through its mouth or the fresh of these animals that is eaten as food.

Carbon: is a very abundant element. It exists in pure or nearly pure forms – such as diamonds and graphite – but can also combine with other elements to form molecules. 

Trace: to find some or something that was lost.

Amber: hard translucent fossilized resin produced by extinct coniferous trees of the Tertiary period, typically yellowish in color.

Fossil: the shape of bone, a shell, or a plant or animal that has been preserved in rock for a very long period.

Trilobite: a simple, flat sea creature that lived in the earlies period of life on aerth, with a hard outer layer and a body in three parts.

Preserved: to keep something as it, especially in order to prevent it from decaying or being damaged or destroyed.

Mineral: is a naturally occurring inorganic solid, with a definite chemical composition, and an ordered atomic arrangement. 

Dinosaur: are a group of reptiles that dominated the land for over 140 million years (more than 160 million years in some parts of the world). They evolved diverse shapes and sizes.