Oakum
Oakum is a preparation of tarred fibre used to seal gaps. Its main traditional applications were in shipbuilding, for caulking or packing the joints of timbers in wooden vessels and the deck planking of iron and steel ships; in plumbing, for sealing joints in cast iron pipe; and in log cabins for chinking. In ship caulking, it was forced between the seams using a hammer and a caulking iron, then sealed into place with hot pitch.
List of tar pits
This is a list of notable tar pits throughout the world. Tar pits, which are often covered with dust and leaves can trap animals that step into them. Over time, the skeletons of such animals become preserved as fossils. Some of the largest deposits of fossils exist within tar pits.