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.
Bog iron is a renewable resource, making it particularly important. It can be harvested from different parts of the bogs each year. After the limonite was removed, precipitation of the iron oxide began anew and in only 20 to 30 years a new crop was ready for production.