Natural History & Ecology: Mature striped dolphins may range in length from 180 cm to 256 cm and 110 to 160 kg in weight. Average length at sexual maturity has been found to be 195 to 220 cm for both males and females of the species at an age of 9 to 10 years old.
Bog iron is a type of iron ore composed of mostly mineral goethite and other iron-bearing minerals with impurities like clay or plant debris. Bog iron used to be a very important ore of iron before better alternatives like banded iron formations were discovered.
The carbon content of cast iron is 2.1 percent or more. There are four basic types of cast iron:Gray cast iron, which is relatively soft. It's easily machined and welded, and you'll find it used for engine cylinder blocks, pipe, and machine tool structures.White cast iron, which is hard, brittle, and not weldable.