Breccia is a name given to clastic sedimentary rocks that are formed by clinging together of a large number of angular fragments. Breccia is formed with the space between the fragments either filled by smaller fragments or mineral cement, which is responsible for holding the rock together. Breccias have angular fragments. In other words, Breccia has angular clasts. â¢ Fragments are much more rounded in conglomerates. In other words, Conglomerate has rounded clasts.
Hi, I'm Mark Lauf with Castaway Marina here in Queensbury, New York. Today for About.com I'm here to tell you about different types of power boats. Fishing boats are a very popular type of boat. They come usually in aluminum construction and in fiberglass construction. They're generally outboard powered. Some of the more common types of fishing boats are the small aluminum open type boats that you can paddle or row or put a small outboard on.
Human-powered watercraft. Above: sweep-oar rowing a coxed pair. Below: an amphibious bicycle. Human-powered watercrafts are watercrafts propelled by human power. The three main methods of collecting human power are directly from the hands or feet, through the hands with oars, paddles, or poles, or through the feet with pedals and a crank or treadle. While most human-powered watercraft use buoyancy to maintain their position relative to the surface of the water, a few, such as human-powered hydrofoils and human-powered submarines, use hydrofoils, either alone or in addition to buoyancy.