The fossil may have lost water, or color, or the proteins of the soft tissue may have degraded. Unaltered hard parts: teeth and very recent shells, bone or shell encased in petroleum or in ...
The calcium carbonate precipitated out of the water and eventually solidified into limestone. Numerous marine organisms used the dissolved calcium carbonate in the seawater to form internal skeletons ...
Fossilised remains of dead plants and animals are known as body fossils. This can include fossil bones, claws, teeth, shells, tree trunks and leaves. Other fossilised signs of a plant or animal are ...
Fossilised remains - including fossil bones and teeth - are known as body fossils. Fossilised shells are also body fossils. Other fossilised signs of a plant or animal are called trace fossils.
Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...
The fossil that was originally interpreted to be a plant, but researchers have now discovered is the inside of the shell of a baby turtle. Disclaimer: AAAS and EurekAlert! are not responsible for ...