Mammoth construction of the Great Pyramid of ancient Egypt. The earliest known proboscideans, the clade that contains the elephants, existed about 55 million years ago around the Tethys Sea area. The closest relatives of the Proboscidea are the sirenians and the hyraxes. The family Elephantidae is known to have existed six million years ago in Africa, and includes the living elephants and the mammoths. Among many now extinct clades, the mastodon is only a distant relative of the mammoths, and part of the separate Mammutidae family, which diverged 25 million years before the mammoths evolved. The following cladogram shows the placement
Mastodon Township, Michigan females. The per capita income for the township was $16,823. About 6.3% of families and 13.2% of the population were below the poverty line, including 22.5% of those under age 18 and 6.3% of those age 65 or over. Mastodon Township, Michigan Mastodon Township is a civil township of Iron County in the U.S. state of Michigan. As of the 2000 census, the township population was 668. Mastodon was so named from the fact mastodon bones were discovered when sinking a mine shaft. Mastodon may have also been named for the size of the large, iron ore body which was